lemon2008 发表于 2011-8-23 20:47:35

Siemens Sensation 64 Protocols

1,64 Slice MDCT Protocols: Carotid CTA
Specific anatomic regionCarotid CTA
ApplicationCarotid stenosis
AuthorElliot K Fishman, MD
Reference SourceJHU Protocol
Scanner UsedSiemens Sensation 64
KV/Effective mAs/ Rotation time (sec)120/ 200 / .33
Detector Collimation (mm).6
Slice thickness (mm).75
Pitch.9
KernelB20
Reconstruction interval.5
Image order (acquisition)Cr-ca
Oral contrastN/A
IV contrast volume and type100 cc of Omnipaque 350 or Visipaque 320
Injection rate4cc/sec
Scan delay (sec)15 sec empirical delay / bolus tracking
3D technique usedVRT/MIP
Comment:
Bolus tracking - ROI placed at aortic arch, threshold set at 70 HU. 3D mapping using both VRT and MIP are part of the standard carotid artery protocol to define the presence, location, and extent of stenosis. [*]We do not routinely do a non-contrast study.

2,64 Slice MDCT Protocols: Head and Neck
Specific anatomic regionPeds neck
Applicationmass or abscess
AuthorElliot K Fishman, MD
Reference SourceJHU Protocol
Scanner UsedSiemens Sensation 64
KV/Effective mAs/ Rotation time (sec)120/ 90 / 1.0
Detector Collimation (mm)0.6
Slice thickness (mm)3mm and .75mm
Pitch0.9
KernelB30s medium smooth- Abdomen window
B70s very sharp- Bone
Reconstruction interval3mm x 3mm ST and Bone
0.75mm x 0.5mm ST
Image order (acquisition)Cr-ca
Oral contrastN/A
IV contrast volume and typeOmnipaque 350
depends on weight (up to 2 cc/kg)
Injection rate1.5cc/sec (depends on IV up to 2cc)
Scan delay (sec)Depends on patient
3D technique usedVolume rendering
Comment: Extension of scan into mediastinum may be necessary to define the full extent of the mass
3,64 Slice MDCT Protocols: Head and Neck
Specific anatomic regionNeck
ApplicationR/O mass or nodes or abscess
AuthorElliot K Fishman, MD
Reference SourceJHU Protocol
Scanner UsedSiemens Sensation 64
KV/Effective mAs/ Rotation time (sec)120/ 200 / 1.0
Detector Collimation (mm)0.6
Slice thickness (mm)3mm and .75mm (for 3D)
Pitch0.9
KernelB31f medium smotth + : Larynx window
B70s very sharp : Head Bone window
Reconstruction interval3mm x 3mm ST and Bone & .5mm (3D)
Image order (acquisition)Cr-ca
Oral contrastN/A
IV contrast volume and type100-120 cc Omnipaque 350
Injection rate3.0-2.5 cc/sec
Scan delay (sec)Depends on patient, but in 30 sec range
3D technique usedN/A
Comment:
If a mass is seen 3D mapping ca be done by reconstructing data at .75mm slice thickness and .5mm intervals. [*]Scan delay of minimum 30 seconds is needed to visualize both carotid artery and jugular vein.

4,64 Slice MDCT Protocols: Head and Neck
Specific Anatomic Region Neck
Application R/O Jugular vein thrombosis
Author Elliot K. Fishman, MD
Reference Source JHU Protocol
Scanner Used Siemens Sensation 64
KV/Effective mAs/Rotation time (sec) 120/200/0.33
Detector Collimation (mm) 0.6
Slice Thickness (mm) 3 or .75
Pitch 0.9
Kernel 31
Reconstruction Interval 3 or .5
Image Order (acquisition) Cr-ca
Oral Contrast N/A
IV contrast volume and type 100 cc of Omnipaque-350
Injection Rate 3 cc/sec
Scan delay (sec) 40 to 50
3D technique used VRT
Comment: Scanning too early can cause "pseudo-lesions." I recommend scanning from the arch through the base of the skull. MPR and coronal 3Ds with VRT are helpful.
5,64 Slice MDCT Protocols: Head and Neck
Specific Anatomic Region Neck
Application R/O Jugular vein thrombosis
Author Elliot K. Fishman, MD
Reference Source JHU Protocol
Scanner Used Siemens Sensation 64
KV/Effective mAs/Rotation time (sec) 120/200/0.33
Detector Collimation (mm) 0.6
Slice Thickness (mm) 3 or .75
Pitch 0.9
Kernel 31
Reconstruction Interval 3 or .5
Image Order (acquisition) Cr-ca
Oral Contrast N/A
IV contrast volume and type 100 cc of Omnipaque-350
Injection Rate 3 cc/sec
Scan delay (sec) 40 to 50
3D technique used VRT
Comment: Scanning too early can cause "pseudo-lesions." I recommend scanning from the arch through the base of the skull. MPR and coronal 3Ds with VRT are helpful.
6,64 Slice MDCT Protocols: Head and Neck
Specific anatomic regionInternal auditory canal (IAC)
ApplicationR/O mass
Author 作者Elliot K Fishman, MD
Reference SourceJHU Protocol
Scanner UsedSiemens Sensation 64
KV/Effective mAs/ Rotation time (sec)120/ 200 / 1.0
Detector Collimation (mm)0.3
Slice thickness (mm).4
Pitch1
Kernel70 UHR
Reconstruction interval.2 mm
Image order (acquisition)Cr-ca
Oral contrastN/A
IV contrast volume and typeN/A
Injection rateN/A
Scan delay (sec)N/A
3D technique usedVRT & MPR
Comment:
[*]The best in class for base of skull

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