Thoracoabdominal-Aortoiliac MDCT Angiography Using Reduced Dose of Contrast Material
Shigeto Kubo1,2,
Eiji Tadamura1,
Masaki Yamamuro1,
Ryohei Hosokawa3,4,
Takeshi Kimura3,
Toru Kita3,
Masashi Komeda5 and
Kaori Togashi1
1 Department of Nuclear Medicine and Diagnostic Imaging, Kyoto University
Graduate School of Medicine, Kyoto, Japan.
2 Department of Radiology, Beth Israel Deaconess Medical Center, 330 Brookline
Ave., Boston, MA 02215.
3 Department of Cardiovascular Medicine, Kyoto University Graduate School of
Medicine, Kyoto, Japan.
4 Present address: Division of Cardiology, Kitano Hospital, Tadukekofukai
Medical Research Institute, Osaka, Japan.
5 Department of Cardiovascular Surgery, Kyoto University Graduate School of
Medicine, Kyoto, Japan.
View larger version (10K):
[in a new window]
|
Fig. 1A —Graphs show mean arterial enhancement and SD along
z-axis for both patient groups. Mean arterial enhancement and SD
along z-axis are shown for 100-mL group. Note small deviations in
arterial enhancement values and ideal plateau-shaped aortoiliac enhancement
profile along z-axis.
|
|
View larger version (10K):
[in a new window]
|
Fig. 1B —Graphs show mean arterial enhancement and SD along
z-axis for both patient groups. Mean arterial enhancement and SD
along z-axis are shown for 50-mL group. Note shallow saddle-shaped
aortoiliac enhancement profile with slightly larger SD compared with that in
100-mL group.
|
|
View larger version (10K):
[in a new window]
|
Fig. 2A —Graphs show effect of patient weight on enhancement.
Correlations between arterial enhancement at level of 44 cm along
z-axis and patient body weight in 100-mL group (A) and 50-mL
group (B) are shown.
|
|
View larger version (10K):
[in a new window]
|
Fig. 2B —Graphs show effect of patient weight on enhancement.
Correlations between arterial enhancement at level of 44 cm along
z-axis and patient body weight in 100-mL group (A) and 50-mL
group (B) are shown.
|
|
View larger version (84K):
[in a new window]
|
Fig. 3A —Coronal maximum-intensity-projection images of two patients.
Image of 77-year-old man in 100-mL group after endovascular repair of thoracic
aortic aneurysm and with residual abdominal aortic aneurysm shows uniform
enhancement throughout thoracoabdominal-aortoiliac system: top of aortic arch,
356 H; origin of celiac axis, 354 H; and origin of common iliac artery, 343 H.
Perivenous artifacts generated by pooling of contrast agent in superior vena
cava (SVC) and high attenuation in pulmonary trunk cause blurred MDCT
angiogram when injecting 100 mL of contrast medium only; SVC (arrow)
was 1,777 H and main pulmonary artery (arrowhead) was 425 H.
|
|
View larger version (82K):
[in a new window]
|
Fig. 3B —Coronal maximum-intensity-projection images of two patients.
Image of 79-year-old man in 50-mL group after endovascular stent-graft
procedure of abdominal aortic aneurysm shows uniform enhancement throughout
thoracoabdominal-aortoiliac system: top of aortic arch, 349 H; origin of
celiac axis, 330 H; and origin of common iliac artery, 325 H. Administration
of 50 mL of contrast medium followed by 20-mL saline flush diminished
perivenous artifacts generated by pooling of contrast agent in SVC and reduced
high attenuation in pulmonary trunk; SVC (arrow) was 118 H and main
pulmonary artery (arrowhead) was 258 H.
|
|
View larger version (85K):
[in a new window]
|
Fig. 4A —79-year-old woman in 50-mL group with preoperative thoracic
aortic aneurysm and postoperative abdominal aortic aneurysm. Coronal
maximum-intensity-projection (A) and multiplanar reconstruction
(B) images clearly show relationship between aortic branches and
thoracic aortic aneurysm.
|
|
View larger version (117K):
[in a new window]
|
Fig. 4B —79-year-old woman in 50-mL group with preoperative thoracic
aortic aneurysm and postoperative abdominal aortic aneurysm. Coronal
maximum-intensity-projection (A) and multiplanar reconstruction
(B) images clearly show relationship between aortic branches and
thoracic aortic aneurysm.
|
|
View larger version (64K):
[in a new window]
|
Fig. 5A —81-year-old woman in 50-mL group after endovascular
stent-graft procedure of thoracic aortic aneurysm and intravascular stent
procedure in right external iliac artery. Coronal maximum-intensity-projection
image reveals residual abdominal aortic aneurysm, partial right renal
infarction (open arrow), occlusion of left superficial femoral artery
(solid arrow), and severe stenosis of left internal iliac artery
(arrowhead).
|
|
View larger version (125K):
[in a new window]
|
Fig. 5B —81-year-old woman in 50-mL group after endovascular
stent-graft procedure of thoracic aortic aneurysm and intravascular stent
procedure in right external iliac artery. Axial CT image shows partial right
renal infarction, which is also visible on A.
|
|
View larger version (82K):
[in a new window]
|
Fig. 6A —78-year-old man with emphysema in 50-mL group who presented
for follow-up after endovascular stent-graft procedure for abdominal aortic
aneurysm. Coronal maximum-intensity-projection image shows occlusion of right
internal iliac artery distal to intravascular stent (arrow) and
slightly enhanced lesion in right lower region (arrowhead).
|
|
View larger version (97K):
[in a new window]
|
Fig. 6B —78-year-old man with emphysema in 50-mL group who presented
for follow-up after endovascular stent-graft procedure for abdominal aortic
aneurysm. Axial CT images show consolidation in right lung.
|
|
View larger version (118K):
[in a new window]
|
Fig. 6C —78-year-old man with emphysema in 50-mL group who presented
for follow-up after endovascular stent-graft procedure for abdominal aortic
aneurysm. Axial CT images show consolidation in right lung.
|
|
CiteULike 
Complore 
Connotea 
Del.icio.us 
Digg 
Reddit 
Technorati What's this?
Copyright © 2006 by the American Roentgen Ray Society.
