By Roland Bruening, Thomas Flohr
Multislice expertise has made it attainable to enquire huge sections of the human physique in a really short while. The four- and 16-row structures presently on hand necessitate using new protocols, that are proposed herein. In a handy double-page format, this e-book offers based info on all regimen protocols to be used for multislice CT. the quantity covers all investigations of the brain, neck, lung and chest, stomach and the outer edge, in addition to specified protocols for the middle, for CT angiography and for CT-guided interventions. each one protocol is displayed en bloc, allowing quick appreciation of the scanner settings and the indicators.
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Extra resources for Protocols for Multislice CT: 4- and 16-row Applications
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Case courtesy of Dr. B. 5 s Scan orientation Caudo-cranial Scanner settings 120 kV, 90–180 eff. mAs Kernel (algorithm) Soft Window (width/center) 120/45 Contrast medium Yes Administration Monophasic Volume 120 ml Flow rate 3 ml/s Scan delay 100 s Comments This protocol can be used to detect or exclude a thrombosis of the superior sagittal sinus, the sigmoid sinus, or the large cephalic veins. CTA is not capable of detecting or excluding a cavernous sinus thrombosis or of the cephalic veins. Figure 2a shows an example of an axial cut in a female patient with bleeding and an extensive sinus vein thrombosis, Fig.
For a quick overview,VRT reconstructions seem to be very efficient. However, maximum reproducibility is achieved by axial scans in area measurements. If no MPR reconstruction is planned, the reconstruction increment can be as large as 5 mm. 8 mm with 50% overlap. Figure 2 shows a CTA of the carotids in a young male patient with an ICA occlusion (dissection) on the left side. Coronal and sagittal MPR reconstructions of the left ICA in this patient are seen in Fig. 2a,b. An example of a VRT reconstruction (same patient) can be seen in Fig.
No movement must occur during the scan; sometimes restraints have to be used. 2. Large-caliber venous access is necessary. 3. An unenhanced CCT should precede this protocol. 0 s Scan orientation Caudo-cranial Scanner settings 120 kV, > 110 mAs Kernel (algorithm) Soft Window (width/center) 120/45 Contrast medium Yes Administration Monophasic Volume 40–50ml Flow rate 8 ml/s (5–10 ml/s) Scan delay 0 s, repeat scanning Comments Perfusion CT is a modern imaging procedure for visualizing local cerebral perfusion.