29.12.2021 Views

Diagnostic ultrasound ( PDFDrive )

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

652 PART II Abdominal and Pelvic Sonography

A

B

C

D

E

F

FIG. 18.33 Elevated Resistive Indices (RIs) in Two Patients. (A)-(C) Acute rejection. (A) Sagittal sonogram shows increased cortical

echogenicity. (B) Spectral Doppler ultrasound done initially shows no low in diastole and thus an RI of 1.0. (C) Follow-up spectral Doppler ultrasound

1 week later shows reversal of low in diastole, which coincided with the clinical deterioration of the patient. (D)-(F) Collecting system obstruction.

(D) Sagittal scan shows grade 3 pelvocaliectasis secondary to ureteral stricture (not shown). (E) Spectral Doppler shows RI of 1.0. (F) Spectral

Doppler ultrasound performed after resolution of the pelvocaliectasis shows a normal RI of 0.72.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!