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Volume 2 - Atomic Energy Regulatory Board

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APPENDIX-8C-I<br />

(Refer section 3.6.3)<br />

PART-III<br />

A. MECHANICAL TESTS<br />

A.1 Alignment of Table to Gantry<br />

Check the congruence between the gantry midline and table midline using<br />

plumb line.<br />

Result (Gantry midline to table midline) :<br />

Tolerance : ± 5 mm<br />

A.2 Scan Localisation Light Accuracy (use film without screen)<br />

Exposure parameters : kVp : mAs: Slice thickness (min) :<br />

Result :<br />

Alignment error : Internal laser light :—————— mm<br />

External laser light:—————— mm<br />

Tolerance : ± 2.0 mm<br />

A.3 Gantry Tilt<br />

Exposure parameters : kVp : mAs:<br />

Result :<br />

Actual gantry tilt :<br />

Measured gantry tilt :<br />

Tolerance : ± 3 0<br />

A.4 Table Position /Incrementation ( same film can be used for tests A2, A3, and<br />

A4)<br />

Initial table position (arbitrary) :<br />

Load on couch :<br />

Exposure parameters : kVp : mAs: Slice thickness :<br />

Applied table incrementation :<br />

Tolerance<br />

: ± 2.0 mm<br />

Table position from 1 cm 2 cm 3 cm 4 cm 5 cm<br />

reference position<br />

Expected<br />

Measured<br />

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