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99mTc-basedmyocardial perfusion agentsare replacing 20'TIdue to superiorimaging characteristics.Physiologically inert noble gas. Most of thegas that enters circulation returns tolungs and is exhaled. Exhaled 133Xegas istrapped (adsorbed) by charcoal filtersystem.20'TI Thallous chloride(01)Injected at maximalstress. Image-10-15 min later.Redistributionimage -4 hr afterstress image.Accumulates in viablemyocardium, analogousto potassium.Identification andsemiquantitative assessmentof myocardial ischemia andinfarction. Also localizes inparathyroid adenomas.NoneInhalation; 133Xefreelyexchanges between bloodand tissue; concentratesmore in fat than in othertissues.Pulmonary function. Gas isadministered by inhalationfrom a closed respirator system.Note: Radiopharmaceutical used <strong>for</strong>: D, diagnostic imaging; DNI, diagnostic nonimaging; T, therapy.Method of administration: IV, intravenous; 1M, intramuscular; IC, intracavitary; ORL, oral; INH, inhalation.RBC, red blood cell; WBC, white blood cell; NA, not applicable.
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Preface xvAcknowledgmentsForeword x
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Chapter 9: Fluoroscopy 2319.1 Funct
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16.3 Transducers 48316.4 Beam Prope
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B.3 Radiological Data for Elements
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We are deeply grateful to that part
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Can medical physics be interesting
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INTRODUCTION TO MEDICALIMAGINGMedic
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FIGURE 1-2. The chest x-ray is them
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FIGURE 1-4. A computed tomography (
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angles around the patient. These pr
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FIGURE '-8. Sagittal (upper left),
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ducer, which records the returning
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TABLE 1-1. THE LIMITING SPATIAL RES
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WAVELENGTH(nanometers)FREQUENCY(her
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The physical properties of the most
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The energy required to remove an el
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An electron cascade does not always
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160150140130120110100N
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The binding energy can be calculate
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INTERACTION OF RADIATIONWITH MATTER
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x10 3 7becomes electrically neutral
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Electrons can undergo inelastic int
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The nuclide produced by neutron abs
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Compton scattering results in the i
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CharacteristicX-rays:A: 0.6 keV (N~
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10030 \~ r.." Photoelectric Effect
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Attenuation is the removal of photo
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The relationship between material d
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HVL). Most practical applications o
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MFP = 1- = __ 1__ = 1.44 HVLI.l 0.6
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For x- and gamma rays, kerma can be
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1 R = 2.58 X 10- 4 C/kg (exactly)Ra
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TABLE 3-4. RADIATION WEIGHTING FACT
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TABLE 3-6. RADIOLOGICAL QUANTITIES,
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Computers were originally designed
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TABLE 4-2. CONVERSION OF 42 (DECIMA
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Binary Representationof Signed Inte
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Chapter 4: Computers in Medical Ima
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TABLE 4-5. MAXIMAL ERRORS WHEN DIFF
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Main memory is used for these funct
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A CPU fetches and executes the inst
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FIGURE 4-6. Hard-disk drive. Aread/
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Table 4-6 compares the characterist
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erwise identical, the computer with
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function, such as a disk head crash
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Scintillation camera planarSPECTPET
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(1.4 MB/disk)(l,024 2 bytes/MB)/[(6
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DAC converts each digital number to
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UnpolarizedlightHorizontallypolariz
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FIGURE 4-15. Graphs of four transla
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For example, it is often useful to
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X-RAY PRODUCTION, X-RAYTUBES, AND G
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1 _2 -3-1Impact with nucleus:Maximu
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FIGURE 5-4. Generation of a charact
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Cable sockets ~FIGURE 5-6. The majo
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~C1.61.41.2 _~ 1.0::l0 0.8Q).00.62-
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Rotor~~ ~+-statorFIGURE 5-11. The a
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There are three major tradeoffs to
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FIGURE 5-16. Various tools allow me
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5.3 X-RAY TUBE INSERT, TUBE HOUSING
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TABLE 5-3. MINIMUM HALF VALUE LAYER
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Induced electronflow in conductorRe
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Power is the rate of energy product
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used to modulate voltage, autotrans
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mAand mAscontrolPhototimercircuitsF
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(a)Electron flow through single rec
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asic components of a single-phase t
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In three-phase generator designs, h
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greater overall input power). Next,
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nected to the contactors that dose
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600500~5 4001:~•..=:l()300Q).0=:l
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100% Ripple \5% Ripple /\ ••.-
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TABLE 5-6. X-RAY TUBE FOCAL SPOTSIZ
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Chapter 5: X-Ray Production, X-Ray
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of the chart. Like the single-expos
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Projection radiography, the first r
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IEi\\i~eFIGURE 6-2. The sides andhe
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sure on the screens, the cassette m
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version efficiency, the approximate
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(and vice versa). This phenomenon i
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~80o"-'"{)' 70c.~ 60lij 50c.240 .
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film OD. If the screen is made thic
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Film has excellent spatial resoluti
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-(/l~ 2.0-c:8 1.51.0-(/l~ 2.0-c:8 1
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educed latitude. The shaded region
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TABLE 6-2. TISSUE HALF-VALUELAYERS
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PrimaryScatterFIGURE 6-22. A: Scatt
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ferent locations from within the pa
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lar to the direction of the slits.
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FIGURE 6-30. Air gap geometry canre
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silver halidecrystalssensitivityspe
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•FIGURE 7-3. The fate of an expos
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DeveloperActivatorRestrainerPreserv
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increased too much because the numb
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can be achieved. Film manufacturers
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Modern x-ray equipment is computer
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wee en0.25Ol0U. 0.20+Q)(f) 0.15COCO
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Mammography is a radiographic exami
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Other modalities that have been use
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plished by magnetic induction. A so
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ReferenceAxisCentra0AxisProjectedfo
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30 kVp26 kVp30 kVp26 kVp(b)2.01.81.
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OJE 25.E(fl.9 20o~ 15"'___ to 45 x
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TABLE 8-2. REQUIREMENTS FOR MINIMUM
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TerminationCircuitFIGURE 8-15. The
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simulations and experimental measur
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1.21.11.00.90.80.70.60.50.40.30.20.
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2!£.= 1.85 xSODSOD35cmSID65cmOlD30
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Film BaseFilm EmulsionPhosphor Scre
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equiring a compensatory increase in
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0.25 -Base + Fog0.20Density 0.150.1
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characteristic curves, the correspo
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achieving a pixel size at the image
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Chapter 8: Mammography 223TABLE 8-6
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ifies that the mammography facility
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TABLE 8-9. SUMMARY TABLE OF ANNUAL
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preting radiologists, mammography t
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with the fluoroscopy imaging chain
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FIGURE 9-4. A scanningelectron micr
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cm 2 area of the 9-inch-diameter in
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_ 100~I 20 em patient ~~•.... _~-
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Video CamerasGeneral OperationThe c
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FIGURE 9-11. The flat panelimaging
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higher. Cine radiography uses very
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put, and consequently frame averagi
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contrast" selections on the console
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specific applications, such as GIIG
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3'2'E~wtJ)w 0.3~,======_o~"~~--;~ _
Page 548:
time estimate of the amount of radi
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.~! ~i !j t--------------Ij• •s
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'E 2O . O 80(,)~ 100_70-~0CIlIIIr::
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40003500CIl 3000::s~ 2500CIlB 2000U
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can be radically changed. Therefore
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FIGURE 10-10. A: An isometric displ
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FIGURE 10-13. Some physical mechani
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some clinical applications, the blu
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would correspond to 1 cycle/mm. If
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I;:' 0.6irI-:!: 0.41.0 2.0 3.0 4.0S
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or stochastic component into the im
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~~2IIIs:::I I>o40 60 80 100 120 140
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The term quantum is defined as "som
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Stage Description System P System Q
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.g tides:eis.Ec(~ co~o o 2 4 6 8 10
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detectorelements[-I I detector aper
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Since most patient anatomy does not
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detail curves are commonly used in
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actually calls nor-The specificity
Page 626:
Digital radiographic image receptor
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-8 0.8:J:=~0.6«g! 0.4:;:;ellGi0::
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to a very bright light source, whic
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Lens Coupled Intensifying ScreenFIG
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discretedetectorelementsFIGURE 11-7
Page 646:
light sensitive areaFill Factor = a
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for digital stereotactic biopsy. Br
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Because the slot width (4 mm) is mu
Page 658:
One of the advantages of having an
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ness. Windowing and leveling of a d
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nel is called a delta function,anyw
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pixels are averaged to go from a 51
Page 674:
Geometric tomography, also called b
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ground anatomy causes geometric tom
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of relatively rapid readout, allowi
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system, the amount of vascular sten
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dual-energy subtraction is availabl
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point on the image. Consequently, w
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FIGURE 13-3. Computedtomographic (C
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FIGURE 13-5. First-generation (rota
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FIGURE 13-7. Third-generation (rota
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FIGURE 13-10. The fan beam geometry
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helical x-ray tubepath around patie
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septa that separate the individual
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detector array modules. With a trad
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Slice Thickness: MultipleDetector A
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This implies that the upper limit o
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FIGURE 13-22. An image of a test ob
Page 740:
The constant ~t factors out, result
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6 8A+B=77 A+C=6A+D=57 B+C=9B+D=8C+D
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simple backprojection, p(x) is back
Page 752:
The units for the x-axis in Fig. 13
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msec is preprocessed, mathematicall
Page 760:
FIGURE 13-33. The coronal, sagittal
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ware through the volume data set, f
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of CT slices. The MSAD could be mea
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position along torsoFIGURE 13-37. D
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Factors AffectingSpatial Resolution
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x-ray beam hardeningFIGURE 13-38. T
Page 784:
FIGURE 13-41. A partialvolume artif
Page 788:
motion of the electrons in either a
Page 792:
Biologically relevant elements that
Page 796:
FIGURE 14-4. A: A single proton pre
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FIGURE 14-5. A: The laboratory fram
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magnetic field are separated by an
Page 808:
8 1 at Larmor FrequencyzMot:/81....
Page 812:
The "decay" of the FID envelope is
Page 816:
method to determine the T1 time of
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50 msec). Molecular motion, size, a
Page 824:
TEI'I180 0 EchoRotatingframe./FID s
Page 828:
--_. unsaturatedpartiallysaturated:
Page 832:
the figure on the left (longitudina
Page 836:
Imageintensit)GrayWhiteFat1000 2000
Page 840:
TRTERFpulses90 0readout~~~~~~--n~18
Page 844:
Transverse decay (T2)Imageintensit~
Page 848:
Rotating frame../FIGURE 14-29. Grad
Page 852:
very shortTR. In these two regimes,
Page 856:
FIGURE 14-32. A spoiled transverse
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acquired. Because the BOLD sequence
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412 Section II: Diagnostic Radiolog
Page 870:
MAGNETIC RESONANCE IMAGING(MRI)The
Page 874:
Net gradient = ~G 2 + G 2 + G 2x Y
Page 878:
strength, an applied RF pulse with
Page 882:
FIGURE 15-7. The width of the sinc
Page 886:
1•1 cycle/em :1::UAmplitude: 1.0~
Page 890:
positionally dependent phase shift
Page 894:
xImage (grayscalevalue)FIGURE 15-14
Page 898:
8. The final image is a spatial rep
Page 902:
~.......--, ----J+*-.J4~====~_~~.\-
Page 906:
FEG n n n IL.-ct--Echo ,I.16 ms 32
Page 910:
ing time is approximately equal to
Page 914:
sition of the signals (Fig. 15-24),
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this is unacceptable for standard c
Page 922:
FIGURE 15-27. Evolution of a narrow
Page 926:
Unsaturated spins: high signalFlow-
Page 930:
volume and places this value in the
Page 934:
In MRI, artifacts manifest as posit
Page 938:
·······i..··I·I~IdealFIGU
Page 942:
FIGURE 15-33. A single bad pixel in
Page 946:
On Tl-weighted images of the head,
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A higher frequency encode gradient
Page 954:
c:~...:L~"'FOii·"·"""~·~- ~; t--
Page 958:
purely resistive system is the abil
Page 962:
RF coils create the B 1 field that
Page 966:
86~~ c:~"0~"0m0::214Axial distance
Page 970:
15-2. Qualitative and quantitative
Page 974:
RF exposure causes heating of tissu
Page 980:
Transducer/ ArrayInterrogate bodywi
Page 984:
and its resistance to being com-ulu
Page 988:
are determined by the imaging appli
Page 992:
TABLE 16-2. DECIBEL VALUES. INTENSI
Page 996:
ZI = PICI~~IncidentReflection(echo)
Page 1000:
When C2 > Cl, the angle of transmis
Page 1004:
Penetrationdepth, cm(Distance trave
Page 1008:
Plastic CaseMetal shieldAcoustic ab
Page 1012:
~ ----+thicktransducer~ ----+thintr
Page 1016:
intermediate to those of soft tissu
Page 1020:
Linear ArraysLinear array transduce
Page 1024:
sound beam path is thus largely con
Page 1028:
phase differences of adjacent beams
Page 1032:
III ¢ __ Red;e'vane';ons-~Thicknes
Page 1036:
FIGURE 16-22. Axial resolution iseq
Page 1040:
One way to accomplish this is to ac
Page 1044:
Ultrasound equipment is rapidly evo
Page 1048:
TABLE 16-6. TYPICAL PRF, PRp, AND D
Page 1052:
(3) Demodulation and"Envelope" dete
Page 1056:
systems, and digitally in high-end
Page 1060:
drifted easily and were unstable ov
Page 1064:
State-of-the-art ultrasound scanner
Page 1068:
Image Frame Rate and Spatial Sampli
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els of gray scale. Image storage (w
Page 1076:
Based on the harmonic imaging work
Page 1080:
FIGURE 16-40. Conventional (left) a
Page 1084:
exactly phase reversed, and their s
Page 1088:
FIGURE 16-43. Three-dimensional ult
Page 1092:
occasionally induced by environment
Page 1096:
LiverBoundarydisplacementFIGURE 16-
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Blood moving towards transducerprod
Page 1104:
The continuous-wave Doppler system
Page 1108:
DopplerSignalLow frequencyDoppler s
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eam is aligned at a particular orie
Page 1116:
information is displayed on the vid
Page 1120:
Transducerarray &BeamFormerPulse-ec
Page 1124:
FIGURE 16-54. A comparison of color
Page 1128:
c024VerticalbandE 60..c8-0..(])0 10
Page 1132:
TABLE 16-8. RECOMMENDED QC TESTS FO
Page 1136:
In the pulsed mode of ultrasound op
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ecommends adherence to the ALARA pr
Page 1146:
COMPUTER NETWORKS, PACS,AND TELERAD
Page 1150:
tions protocols. Failure to conform
Page 1154:
The most common LAN medium is Ether
Page 1158:
nodes are both on the same segment
Page 1162:
physics/text will obtain, from a se
Page 1166:
can be programmed to read the traff
Page 1170:
CT North EJCT04_MRG1-:::S:::(Toshib
Page 1174:
a laser and the other using a colli
Page 1178:
(14 x 17 inch) film should be digit
Page 1182:
equipped with specialized software
Page 1186:
The storage may be centralized (i.e
Page 1190:
FIGURE 17-10. Interpretationworksta
Page 1194:
Spatial linearity (freedom from spa
Page 1198:
the faces of the monitors, and to a
Page 1202:
Disadvantagesof PACS1. Initial and
Page 1206:
ital portions of the system can deg
Page 1214:
RADIOACTIVITY AND NUCLEARTRANSFORMA
Page 1218:
TABLE 18-3. PHYSICAL HALF-LIFE (Tp1
Page 1222:
A plot on a lineat axis of activity
Page 1226:
Although the ~- particles emitted b
Page 1230:
The capture of an orbital electron
Page 1234:
RADON-220Alpha DecayT 1/2 = 55 seco
Page 1238:
TECHNETIUM 99MIsomeric TransitionT1
Page 1242:
RADIONUCLIDE PRODUCTION ANDRADIOPHA
Page 1246:
continue to acquire kinetic energy,
Page 1250:
come the nuclear binding forces. Th
Page 1254:
duced), the reactor is said to be s
Page 1258:
chemically separated from other fis
Page 1262:
FIGURE 19-7. Picture of a "wet" mol
Page 1266:
een achieved, the daughter activity
Page 1270:
feres with the preparation of some
Page 1274:
high abundance (94%), their low ene
Page 1278:
Cell SequestrationRBCs are withdraw
Page 1282:
ReceptorBindingThis class of radiop
Page 1286:
closure of alternative treatments;
Page 1290:
RADIATION DETECTION ANDMEASUREMENTT
Page 1294:
Q)•..III•..a:c~010,000800060004
Page 1298:
This equation can be written as fol
Page 1302:
LimitedGeiger-MuellerRegionProporti
Page 1306:
Unlike ion chambers, which can func
Page 1310:
as well. However, most photodiodes
Page 1314:
Chapter 20: Radiation Detection and
Page 1318:
tional to the intensity of the ligh
Page 1322:
"=@ @=@=II "II II II=@-@=@=II II II
Page 1326:
tional to the energies deposited in
Page 1330:
changing the voltage produced by th
Page 1334:
X-Ray and Gamma-Ray Spectroscopy wi
Page 1338:
gamma rays deposit exactly the same
Page 1342:
trum on the left shows a large phot
Page 1346:
FIGURE 20-23. Thyroid probe system.
Page 1350:
FIGURE 20-26. Automatic gamma wellc
Page 1354:
FIGURE 20-27. Dose calibrator. Thed
Page 1358:
The concentration of Mo-99 is most
Page 1362:
Toss of a coinToss of a dieObservat
Page 1366:
TABLE 20-3. FRACTIONAL ERRORS(PERCE
Page 1370:
Multiplication of a number with ran
Page 1374:
NUCLEAR IMAGING-THESCINTILLATION CA
Page 1378:
FIGURE 21-1. Modern rectangular hea
Page 1382:
PulsesfromindividualPMTsPositioncir
Page 1386:
Image in crystal. .LTtTTTlT1llT1TT.
Page 1390:
FIGURE 21-7. Ways that x- and gamma
Page 1394:
front of the collimated camera. Sol
Page 1398:
distant point source if the collima
Page 1402:
TABLE 21-2. TYPICAL INTRINSIC PERFO
Page 1406:
spatial resolution improves (narrow
Page 1410:
LEHRFan-beamPinhole5 10 15 20 25Obj
Page 1414:
X and Y correctionlookup tablesDigi
Page 1418:
methods for measuring the camera pe
Page 1422:
tangle. The MCA-type display presen
Page 1426:
lution collimator may improve spati
Page 1430:
Pairs of digitalposition signalsX 3
Page 1434:
Image Processing in Nuclear Medicin
Page 1438:
FIGURE 21-25. End-diastolic (top) a
Page 1442:
NUCLEAR IMAGING-EMISSIONTOMOGRAPHYT
Page 1446:
FIGURE 22-1 (continued). (B) double
Page 1450:
\- -, ffIffIffIffIffI\\\,\\ , \\fIf
Page 1454:
FIGURE 22-5. SPEeT images created b
Page 1458:
time, attenuation correction in SPE
Page 1462:
Radial~-~IIIIIIIIIIIICenterf----at-
Page 1466:
FIGURE 22-9. Center-of-rotation (CO
Page 1470:
FIGURE 22-11. Head tilt. The camera
Page 1474:
These phantoms are very useful for
Page 1478:
FIGURE 22-15. True coincidence (lef
Page 1482:
TABLE 22-2. PROPERTIES OF SEVERAL I
Page 1486:
elatively low conversion efficiency
Page 1490:
equire less activity to be administ
Page 1494:
Source containingpositron-emitterDD
Page 1498:
RodSourceFIGURE 22-24. Rod source f
Page 1502:
Some cameras are equipped with filt
Page 1506:
Factors Affecting the Availability
Page 1510:
RADIATIONDOSIMETRY,PROTECTION,AND B
Page 1516:
is exposed to cosmic radiation near
Page 1520:
TABLE 23-1. ESTIMATED AVERAGE TOTAL
Page 1524:
TABLE 23-2. ESTIMATED AVERAGE ANNUA
Page 1528:
TABLE 23-5. SUMMARY OF THE ANNUAL C
Page 1532:
Terrestrial28 mremlyrInternal40 mre
Page 1536:
Most film badges can record doses f
Page 1540:
Gamma or X-Ray(Ionization)Digital p
Page 1544:
isfy the majority of the requiremen
Page 1548:
TABLE 23-8. TYPICAL EXPOSURE RATE A
Page 1552:
TABLE 23-9. EFFECT OF DISTANCE ON E
Page 1556:
FIGURE 23-8. The varioussources of
Page 1560:
~ 20~E~(§) 15~ii:.s 1025-.:- 20"*
Page 1564:
0.75); other walls and ceiling have
Page 1568:
and solving for T yields the requir
Page 1572:
and the corresponding closest dista
Page 1576:
Ị ..2cQ)(.)0.!!!.E 0,gQ)(.)c.l9(/
Page 1580:
constant (expressed in units of R-c
Page 1584:
FIGURE 23-13. Dose preparation work
Page 1588:
(e.g., a 400-speed screen-film rece
Page 1592:
Figure 23-14 shows a severe skin in
Page 1596:
protocols (mAs values) are adjusted
Page 1600:
of each workday) and wipe tests (ty
Page 1604:
TABLE 23-17. RECOMMENDATIONS FOR CE
Page 1608:
Eo = initial exposure rate (~15 min
Page 1612:
ation detector (typically a GM surv
Page 1616:
health issues that serve as the ref
Page 1620:
Exposure to airborne activity is al
Page 1626:
RADIATION DOSIMETRYOF THE PATIENTTh
Page 1630:
RadiographyFluoroscopyMammographyNu
Page 1634:
isks. The International Commission
Page 1638:
FIGURE 24-1. The geometry formeasur
Page 1642:
0.309 R x 173 mrad = 53.5 mradRDose
Page 1646:
TABLE 24-7. EFFECTIVE DOSE PER ENTR
Page 1650:
cumulated activity in each source o
Page 1654:
p p p p p -ABLE 24-8. Tc-99m S FACT
Page 1658:
Accuracy of Dose CalculationsAlthou
Page 1662:
Rarely have beneficial applications
Page 1666:
tenets in radiation biology is that
Page 1670:
dition at the time of irradiation,
Page 1674:
lead to carcinogenesis through acti
Page 1678:
anaphasic separation. The extent of
Page 1682:
paragraphs, including dose rate, LE
Page 1686:
.!!2Qi()OJC.;;.~::JCJ)15Qi.0E ::JZ1
Page 1690:
FIGURE 25-10. Phases of the cell'sr
Page 1694:
Specific Organ System ResponsesThis
Page 1698:
In general, the gonads are very rad
Page 1702:
TABLE 25-4. APPROXIMATE DOSE (INAIR
Page 1706:
for a measurable depression in the
Page 1710:
TABLE 25-5. SUMMARY OF THE STAGES,
Page 1714:
the integration of regulatory signa
Page 1718:
Atomic-bomb detonation exposures an
Page 1722:
Source: Adapted from National Acade
Page 1726:
Incidence in exposedpopulationSpont
Page 1730:
The National Academy of Sciences/Na
Page 1734:
OverviewLeukemiaof Specific Cancer
Page 1738:
older than 55 years of age. The ris
Page 1742:
irths in the succeeding generation,
Page 1746:
a specific organ system (the so-cal
Page 1750:
Similar effects have been reported
Page 1754:
TABLE 25-12. ABSORBED DOSE mGy/MBq
Page 1758:
Doll R, Wakeford F. Risk of childho
Page 1766:
FUNDAMENTAL PRINCIPLESOF PHYSICSA.1
Page 1770:
Mass. Length. and TimeMass is a mea
Page 1774:
amount of charge in the system does
Page 1778:
, Current·I·,\. ..:'~ ~.~--------
Page 1782:
FIGURE A-5. A: Direct current. B: S
Page 1786:
FIGURE A-6. Magnetic field descript
Page 1790:
ElectromagneticInductionIn 1831, Mi
Page 1794:
ing potential difference across the
Page 1798: as to cancel in pairs; however, in
Page 1804: C: GeometryArea of circleCircumfere
Page 1808: Densityg/cm 3At massg/moleK-edgekeV
Page 1812: 888 Section V: AppendicesTABLE C-'(
Page 1816: 890 Section V: AppendicesC.3 MASS E
Page 1820: 892 Section V' AppendicesTABLE C-4(
Page 1824: 894 Section v.. AppendicesTABLE C-5
Page 1828: 896 Section V: AppendicesTABLE C-6
Page 1832: 898 Section V' AppendicesTABLE C-7(
Page 1836: TABLE D-1. ROUTE OF ADMINISTRATION,
Page 1840: U) TABLE D-1 (continued).0~Method o
Page 1844: Should be administered within 10 mi
Page 1848: Patient should not have fatty foods
Page 1854: 99mTcMacroaggregated 0.16 ts 0.0161
Page 1858: TABLE D-4. ABSORBED DOSE ESTIMATES
Page 1864: 914 Section V: AppendicesMedical Ph
Page 1868: ASCII. See American Standard Code f
Page 1872: DDAC. See Digital-to-analog convert
Page 1876: Electronic switchltimer, exposure t
Page 1880: Image magnification, spatial resolu
Page 1884: Magnetic resonance imaging (contd.)
Page 1888: Phased array, ultrasound, 490Phosph
Page 1892: Radiation detection (contd)gas-fill
Page 1896: Shoe marks, processor artifacts, 18
Page 1900:
Two dimensional multi planar acquis
Page 1906:
"Nope '" no sign of YOur kitten, Ma
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