140. HIGH RESOLUTION LUNG CT

Indications  Evaluate diffuse lung disease (interstitial, fibrosis)
Number of scan Acquisition/series  3
Scan Acquisition  1. Supine Inspiratory  2. Supine Expiratory Use
 Sequence Mode
 3. Prone Inspiratory
Range  Clavicular heads through both
 costophrenic angles
 Clavicular heads through both
 costophrenic angles
 Clavicular heads through both
 costophrenic angles
Care Dose 4D  On  On  On
Quality Reference mAs  110  130  130 
KV / Effective mAs / Rotation time  120 / 110 / 0.5 seconds  120 / 130 / 0.75
 (scan time full 0.75 sec)
 120 / 130 / 0.75
 (scan time full 0.75 sec)
Detector Collimation  0.75 mm  1 mm  1 mm
Slice Thickness  1 mm  1 mm  1 mm
Pitch factor  1.3  None  None
Kernel (for initial reconstruction)  B30f  B80s  B80s
Increment   1 mm  10 mm feed / scan  10 mm feed / scan
Image order  Cranial - Caudal  Cranial - Caudal  Cranial - Caudal
Oral Contrast  None  None  None
 IV contrast  None  None  None
 Injection Rate  N/A  N/A  N/A
 Scan Delay  N/A  N/A  N/A
 Reconstruction
 (Series to send to PACS)
 1. Recon 3x3 B30f mediastinum medium smooth
 2. Recon 2x2 B80f lung ultrasharp
 3. Recon 1x1 B80s to PACS
 4. Recon 1x1 B80s 3D Card for coronal reconstruction
 5. MIP 20 mm slab 3 mm increments
 6. Recon 1x1 B80s
 7. Recon 1x1 B80s