Detection of Intracranial Aneurysms with Two-dimensional and Three-dimensional Multislice Helical Computed Tomographic Angiography

Neurosurgery ◽  
2004 ◽  
Vol 54 (2) ◽  
pp. 336-341 ◽  
Author(s):  
Marko Kangasniemi ◽  
Teppo Mäkelä ◽  
Seppo Koskinen ◽  
Matti Porras ◽  
Kristiina Poussa ◽  
...  
Keyword(s):  
Intracranial Aneurysms ◽  
First Generation ◽  
Carotid Arteries ◽  
Three Dimensional ◽  
Computed Tomographic Angiography ◽  
Posterior Circulation ◽  
Computed Tomographic ◽  
Aneurysm Detection ◽  
Tomographic Angiography ◽  
Small Aneurysms

Abstract OBJECTIVE Computed tomographic angiography (CTA) has become a diagnostic method for the detection of intracranial aneurysms in cases of subarachnoid bleeding. We sought to evaluate the detection of aneurysms with CTA with a novel multislice helical computed tomographic scanner. METHODS Prospectively, 179 patients underwent multislice CTA, followed by digital subtraction angiography (DSA) of both carotid arteries with or without the posterior circulation, DSA of one carotid artery with or without the posterior circulation, or DSA of the posterior circulation alone. The total number of carotid arteries studied was 298, and the number of vertebrobasilar arteries studied was 124. RESULTS Of 178 aneurysms verified with DSA or intraoperatively, CTA failed to detect 7 aneurysms of 1 to 2 mm and 1 partially thrombosed, 4-mm aneurysm. The sensitivity and specificity of CTA for aneurysm detection were 0.96 and 0.97, respectively. CONCLUSION The first generation of multislice computed tomographic technology does not improve CTA to surpass DSA for the detection of small aneurysms of 1 to 2 mm. In practice, however, CTA is superior as a fast noninvasive method without complications.

scholarly journals The Accuracy and Usefulness of 3D-DSA and 3D-CT Angiography for Cerebral Aneurysms

2001 ◽  
Vol 7 (1_suppl) ◽  
pp. 181-186 ◽  
Author(s):  
F. Ishida ◽  
K. Kawaguchi ◽  
M. Mizuno ◽  
T. Hoshino ◽  
K. Murao ◽  
...  
Keyword(s):  
Intracranial Aneurysms ◽  
Three Dimensional ◽  
Cerebral Aneurysms ◽  
Computed Tomographic Angiography ◽  
Dissecting Aneurysm ◽  
Digital Subtraction ◽  
Computed Tomographic ◽  
3D Ct Angiography ◽  
The Difference ◽  
Tomographic Angiography

For evaluation of intracranial cerebral aneurysms, three-dimensional (3D) digital subtraction angiography (DSA) and 3D-computed tomographic angiography (CTA) were demonstrated in fifteen patients. The diagnostic accuracy of preoperative 3DCTA is equal to that of 3D-DSA except for the case with a dissecting aneurysm. The virtual images of 3D-CTA were well correlated with surgical findings. In endovascular treatment of intracranial aneurysms, 3D-DSA had an obvious advantage in obtaining the best working angle of the C-arm. The major branches originating from the dome were depicted on 3D-DSA in two cases that could not be judged on 3D-CTA. The aim of the present study was to verify the difference between 3D-DSA and 3D-CTA for evaluation of intracranial aneurysms.

scholarly journals Imaging in Propeller Flap Surgery

2020 ◽  
Vol 34 (03) ◽  
pp. 145-151
Author(s):  
Shimpei Ono ◽  
Hiroyuki Ohi ◽  
Rei Ogawa
Keyword(s):  
Low Cost ◽  
Three Dimensional ◽  
Duplex Sonography ◽  
Computed Tomographic Angiography ◽  
Ease Of Use ◽  
Computed Tomographic ◽  
Imaging Tool ◽  
Preoperative Mapping ◽  
Flap Design ◽  
Tomographic Angiography

AbstractSince propeller flaps are elevated as island flaps and most often nourished by a single perforator nearby the defect, it is challenging to change the flap design intraoperatively when a reliable perforator cannot be found where expected to exist. Thus, accurate preoperative mapping of perforators is essential in the safe planning of propeller flaps. Various methods have been reported so far: (1) handheld acoustic Doppler sonography (ADS), (2) color duplex sonography (CDS), (3) perforator computed tomographic angiography (P-CTA), and (4) magnetic resonance angiography (MRA). To facilitate the preoperative perforator assessment, P-CTA is currently considered as the gold standard imaging tool in revealing the three-dimensional anatomical details of perforators precisely. Nevertheless, ADS remains the most widely used tool due to its low cost, faster learning, and ease of use despite an undesirable number of false-positive results. CDS can provide hemodynamic characteristics of the perforator and is a valid and safer alternative particularly in patients in whom ionizing radiation and/or contrast exposure should be limited. Although MRA is less accurate in detecting smaller perforators of caliber less than 1.0 mm and the intramuscular course of perforators at the present time, MRA is expected to improve in the future due to the recent developments in technology, making it as accurate as P-CTA. Moreover, it provides the advantage of being radiation-free with fewer contrast reactions.

Preoperative Use of CT Angiography in Infants With Coarctation of the Aorta

2017 ◽  
Vol 8 (2) ◽  
pp. 196-202 ◽  
Author(s):  
Kirsten Rose-Felker ◽  
Joshua D. Robinson ◽  
Carl L. Backer ◽  
Cynthia K. Rigsby ◽  
Osama M. Eltayeb ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Surgical Approach ◽  
New Technology ◽  
Three Dimensional ◽  
Coarctation Of The Aorta ◽  
Computed Tomographic Angiography ◽  
Great Vessel ◽  
Z Score ◽  
Computed Tomographic ◽  
Tomographic Angiography

Background: Computed tomographic angiography (CTA) and echocardiography (echo) are used preoperatively in coarctation of the aorta to define arch hypoplasia and great vessel branching. We sought to determine differences in quantitative measurements, as well as surgical utility, between modalities. Methods: Infants (less than six months) with both CTA and echo prior to coarctation repair from 2004 to 2013 were included. Measurements were compared and correlated with surgical approach. Three surgeons reviewed de-identified images to predict approach and characterize utility. Computed tomographic angiography radiation dose was calculated. Results: Thirty-three patients were included. No differences existed in arch measurements between echo and CTA ( z-score: −2.59 vs −2.43; P = .47). No differences between modalities were seen for thoracotomy ( z-score: −2.48 [echo] vs −2.31 [CTA]; P = .48) or sternotomy ( z-score: −3.13 [echo] vs −3.08 [CTA]; P = .84). Computed tomographic angiography delineated great vessel branching pattern in two patients with equivocal echo findings ( P = .60). Surgeons rated CTA as far more useful than echo in understanding arch hypoplasia and great vessel branching in cases where CTA was done to resolve anatomical questions that remain after echo evaluation. Two of three surgeons were more likely to choose the surgical approach taken based on CTA (surgeon A, P = .02; surgeon B, P = .01). Radiation dose averaged 2.5 (1.6) mSv and trended down from 2.9 mSv (1.8 mSv; n = 20) to 1.6 mSv (0.5 mSv; n = 7) ( P = .06) with new technology. Conclusion: Although CTA and echo measurements of the aorta do not differ, CTA better delineates branching and surgeons strongly prefer it for three-dimensional arch anatomy. We recommend CTA for patients with anomalous arch branching patterns, diffuse or complex hypoplasia, or unusual arch morphology not fully elucidated by echo.

Three-dimensional bone-free computed tomographic angiography of aneurysms near the skull base using a new bone-removal application

2009 ◽  
Vol 27 (1) ◽  
pp. 31-36 ◽  
Author(s):  
Noriaki Tomura ◽  
Takahiro Otani ◽  
Ikuo Sakuma ◽  
Satoshi Takahashi ◽  
Toshiaki Nishii ◽  
...  
Keyword(s):  
Skull Base ◽  
Three Dimensional ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Bone Removal ◽  
Tomographic Angiography

The Role of Computed Tomographic Angiography in the Diagnosis of Intracranial Aneurysms and Emergent Aneurysm Clipping

Neurosurgery ◽  
1996 ◽  
Vol 38 (3) ◽  
pp. 481-487 ◽  
Author(s):  
John N.K. Hsiang ◽  
Eisen Y. Liang ◽  
Joseph M.K. Lam ◽  
Zhu Xian-Lun ◽  
Wai S. Poon
Keyword(s):  
Intracranial Aneurysms ◽  
Computed Tomographic Angiography ◽  
Computed Tomographic ◽  
Aneurysm Clipping ◽  
Tomographic Angiography
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