CT — Gleznă și retropicior (MCB)

Updated 05/05/25 CT Ankle/Hindfoot Reviewed 05/15/25 Indications - trauma, fracture, dislocation, pain, bone tumor, soft tissue mass, infection, abscess, soft tissue gas, osteomyelitis, pre/post surgical evaluation. Bill under CT Ankle charges. GENERAL SCAN NOTES Remove any metal from the imaging field of view. Patient positioning: Have opposite leg bent at knee with ankle/foot out of way of ankle of interest. Foot must be dorsiflexed with foot perpendicular to tibia (see images at end of protocol). Topogram - distal tibia through bottom of foot. Craniocaudal scan coverage - 3 cm above ankle joint through skin of ball of foot. Base of metatarsals through skin over Achilles tendon (front/back coverage). Adjust FOV (field of view) on topogram to smallest without cropping anatomy. IV Contrast: 100 mL Omnipaque-300, inject at 2.5 mL/sec, 60 secs scan delay. For GE scanners, it is essential for the 1st recon thickness on the scanner to match the 1st recon thickness in this protocol book for the prescribed Noise Index to be valid. The 1st recon should generally be the thickest recon in the protocol. SIEMENS PARAMETERS & RECONS Scan
Care
Scan
Pitch Acq Coll Rot Mode kV mAs Care
Dose kV & Lvl Time Time Sensation 16 spiral 120 120 on NA 0.55 16 0.75 1.0 5.3 Go Up 32 spiral Sn 110 366 on 0.40 32 0.7 1.0 3.9 on 75 Sensation 64 spiral 120 120 on NA 0.90 64 0.6 1.0 2.0 Definition 64 spiral 120 100 on 0.80 64 0.6 1.0 2.3 off Go Top 64 spiral Sn 100 898 on on 75 0.40 64 0.6 1.0 2.3 Drive 128 spiral 120 70 on 0.80 128 0.6 1.0 1.1 off Force 192 spiral 120 70 on 0.80 192 0.6 1.0 0.8 off Recon
Name of Series Thick Interval Kernel Window IR
Lvl Direction AX BONE 2.0 2.0 Br59 / B60f bone/osteo 3 head/feet COR BONE 2.0 2.0 Br59 / B60f bone/osteo 3 front/back SAG BONE 2.0 2.0 Br59 / B60f bone/osteo 3 left/right AX SOFT 2.0 2.0 Br40 / B31f abdomen 3 head/feet Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX SOFT PRE 2.0 2.0 Br40 / B31f abdomen 3 head/feet

CT Ankle/Hindfoot GE PARAMETERS & RECONS Scan
Smart
Slice
Beam
Dose
Pitch Speed Rot
Type SFOV kV mA
Range Noise
Index mA Thick Coll Time Red ASIR Scan
Time on 1.25 10 0.938 9.37 0.5 LS 16 helical large 120 100-440 17.68 NA NA 1.9 Opt 540 helical large 120 100-440 17.68 on 10 0.938 9.37 0.5 NA 1.25 NA 1.9 40 0.984 39.37 0.5 20 20 LS VCT 64 helical large body 120 100-450 22.63 on 1.25 0.4 Disc VCT 64 helical large body 120 100-450 22.63 on 1.25 40 0.984 39.37 0.5 NA NA 0.4 Window
Recon Name of Series Thickness Interval Recon
Algorithm Width/Level Direction AX BONE 1.25 1.25 bone full 2500/480 head/feet Must be first recon. COR BONE 1.25 1.25 bone full 2500/480 front/back SAG BONE 1.25 1.25 bone full 2500/480 left/right AX SOFT 1.25 1.25 std full 400/40 head/feet Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). AX SOFT PRE 1.25 1.25 std full 400/40 head/feet PHILIPS PARAMETERS & RECONS Scan
Dose
3D
Rot Scan
Mode kV Avg
mAs Index Dose Pitch Detect Colli Time Time Incisive 128 helical 120 85 32 on 0.80 64 0.625 1.00 1.1 Name of Series Thick Interval Filter Window iDose Recon
Direction AX BONE 2.0 2.0 YC bone 3 head/feet COR BONE 2.0 2.0 YC bone 3 front/back SAG BONE 2.0 2.0 YC bone 3 left/right AX SOFT 2.0 2.0 B abdomen 3 head/feet Send the above recons on the pre contrast scan (if without only) or on the post contrast scan (if IV given). Send only the following recon on the pre contrast scan (if without and with). head/feet AX SOFT PRE 2.0 2.0 B abdomen 3

CT Ankle/Hindfoot Foot must be dorsiflexed with foot perpendicular to tibia. Axial Plane Coronal Plane Sagittal Plane