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LAMPIRAN HASIL CITRA STEPWEDGE DENGAN VARIASI RASIO DAN
KONSTRUKSI GRID
1. Hasil Citra radiografi stepwedge menggunakan konstruksi grid fokus dengan rasio grid 6:1
tegangan tabung 70kV sampai 90kV dengan step kenaikan 5kV
70kV
75kV
80kV
85kV
90kV
2. Hasil Citra radiografi stepwedge menggunakan konstruksi grid linier dengan rasio grid 8:1
tegangan tabung 70kV sampai 90kV dengan step kenaikan 5kV
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3. Hasil Citra radiografi stepwedge menggunakan konstruksi grid linier dengan rasio grid 10:1
tegangan tabung 70kV sampai 90kV dengan step kenaikan 5kV
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1) X-ray Grid Selection Based on Clean-up Requirements:
Cleanup Ratio/Type Positioning Latitude
Recommended Up To
Remarks
SUPERLATIVE 8:1 criss-cross Distance fair;
centering and leveling-slight
120 KVP Not recommended for tilted
tube technique
EXCELLENT 12:1 linear Very slight 110 KVP (Suitable
for highr KV)
Extra care required for proper alignment; usually
used in fixed mount
EXCELLENT 6:1 criss-cross Good 100 KVP Tube tilt limited to five
degrees
GOOD 8:1 linear Distance fair;
centering and leveling-slight
100 KVP For general stationary grid
use
GOOD (CR) 4:1,6:1 Good 120 KVP CR grid
MODERATE 6:1 linear Good 80 KVP Least expensive of stationary
grids
2)Basic Guidelines:
ANATOMY LINE RATIO DISTANCE
SKULL 103 10:1 36-40"
CHEST 103-150 10:1-12:1 60-72"
CR CHEST 150,178 4:1,6:1 Parallel
ABDOMINAL 103 8:1 34-44"
CR ABDOMINAL 150,178 4:1,6:1 Parallel
SCOLIOSIS STUDIES 85-103 8:1 48-72"
SPECIAL PROCEDURES
MOST STUDIES 103 10:1 36-40"
BI-PLANE 103
criss-cross
10:1 36-40"
SURGICAL ROOM
ORTHOPEDICS 85 8:1 34-44"
CHOLANGIOGRAMS VENOUS STUDIES 103 8:1,10:1 34-44,36-40"
EMERGENCY ROOM
