This document outlines the protocol for performing CT angiography (CTA) from the cerebral arteries to the lower limbs. It discusses indications for CTA including aneurysms, stenosis, dissections, and more. The preparation, positioning, and scanning protocols are provided for CTA of the head to lower limbs as well as the subclavian arteries. Pediatric protocols are also summarized. The document concludes with examples of CTA findings and references.
80. Axial slices Start location: half of carotid a. or neck. End location: down to mid chest (bifurcation). FOV is adjusted to as small as possible; but include shoulder. Carotid arteries
81. Axial slices Start location: half of carotid a. or neck. End location: down to mid chest (bifurcation). FOV is adjusted to as small as possible; but include shoulder. Carotid arteries
86. Cases 20 yr old male with hypertension, CT Renal Angiography showed Renal Artery Stenosis. 50 yr old asymptomatic male. CT Thoracic Angio shows a twisted dilated descending aorta with celiac artery aneurysm.
87. Thank U No thing is impossible, the word itself says “I’m possible”
88. References: King Khalid Universal Hospital, CT Department Protocol. Explained by Mr. Kamal, the supervisor of CT department. Some of the CT angiographic images were taken from websites.
Notas del editor
stent
Either adult or child sedation
Usually we don’t do fr head to feet but from--? in the center of the table ( we know by the sternal or umbilicus)
Rule: 4 ml/sec 18 G 3 ml/sec 20 G
Auto determined by scout… 1.25xo.625= overlap,, .625 is the half of 1.25 (rule) fov=30 is m, 40 is LSec= rotation speed per secIf obese, 130-140 kg soft tissue to minimize the noise
Same procedure
Clearly show the patho, compressed a. Tot of 4 scouts.
Older machine, area of CM is pulmonary trunk. The new is faster, so no of images taken in a time are more.