scholarly journals Assessment of automated cone-beam CT vessel identification software during transarterial hepatic embolisation: radiation dose, contrast medium volume, processing time, and operator perspectives compared to digital subtraction angiography

2018 ◽  
Vol 73 (12) ◽  
pp. 1057.e1-1057.e6 ◽  
Author(s):  
J.C. Durack ◽  
K.T. Brown ◽  
G. Avignon ◽  
L.A. Brody ◽  
C.T. Sofocleous ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Contrast Medium ◽  
Digital Subtraction Angiography ◽  
Processing Time ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Digital Subtraction ◽  
Identification Software

Benefit of cone-beam computed tomography angiography in acute management of angiographically undetectable ruptured arteriovenous malformations

2013 ◽  
Vol 119 (4) ◽  
pp. 1015-1020 ◽  
Author(s):  
Jason P. Rahal ◽  
Adel M. Malek
Keyword(s):  
Digital Subtraction Angiography ◽  
Ct Angiography ◽  
Arteriovenous Malformations ◽  
Cone Beam Ct ◽  
Gamma Knife Radiosurgery ◽  
Imaging Modalities ◽  
Cone Beam ◽  
Digital Subtraction ◽  
Conventional Angiography ◽  
The Third

Object Ruptured arteriovenous malformations (AVMs) are a frequent cause of intracerebral hemorrhage (ICH). In some cases, compression from the associated hematoma in the acute setting can partially or completely occlude an AVM, making it invisible on conventional angiography techniques. The authors report on the successful use of cone-beam CT angiography (CBCT-A) to precisely identify the underlying angioarchitecture of ruptured AVMs that are not visible on conventional angiography. Methods Three patients presented with ICH for which they underwent examination with CBCT-A in addition to digital subtraction angiography and other imaging modalities, including MR angiography and CT angiography. All patients underwent surgical evacuation due to mass effect from the hematoma. Clinical history, imaging studies, and surgical records were reviewed. Hematoma volumes were calculated. Results In all 3 cases, CBCT-A demonstrated detailed anatomy of an AVM where no lesion or just a suggestion of a draining vein had been seen with other imaging modalities. Magnetic resonance imaging demonstrated enhancement in 1 patient; CT angiography demonstrated a draining vein in 1 patient; 2D digital subtraction angiography and 3D rotational angiography demonstrated a suggestion of a draining vein in 2 cases and no finding in the third. In the 2 patients in whom CBCT-A was performed prior to surgery, the demonstrated AVM was successfully resected without evidence of a residual lesion. In the third patient, CBCT-A allowed precise targeting of the AVM nidus using Gamma Knife radiosurgery. Conclusions Cone-beam CT angiography should be considered in the evaluation and subsequent treatment of ICH due to ruptured AVMs. In cases in which the associated hematoma compresses the AVM nidus, CBCT-A can have higher sensitivity and anatomical accuracy than traditional angiographic modalities, including digital subtraction angiography.

scholarly journals Surgivisio® and O-arm®O2 cone beam CT mobile systems for guidance of lumbar spine surgery: Comparison of patient radiation dose

2021 ◽  
Vol 85 ◽  
pp. 192-199
Author(s):  
Julia Rousseau ◽  
Serge Dreuil ◽  
Céline Bassinet ◽  
Sophie Cao ◽  
Hélène Elleaume
Keyword(s):  
Lumbar Spine ◽  
Radiation Dose ◽  
Spine Surgery ◽  
Cone Beam Ct ◽  
Mobile Systems ◽  
Cone Beam ◽  
Lumbar Spine Surgery ◽  
Patient Radiation Dose

Estimated radiation dose according to the craniocaudal angle in cerebral digital subtraction angiography: Patient and phantom study

2019 ◽  
Vol 46 (6) ◽  
pp. 345-350 ◽  
Author(s):  
Yunsun Song ◽  
Youngeun Kim ◽  
Seongsik Han ◽  
Tae Il Kim ◽  
Joon Ho Choi ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Digital Subtraction Angiography ◽  
Phantom Study ◽  
Digital Subtraction

scholarly journals Evaluation of a low-dose protocol for cone beam computed tomography of the temporomandibular joint

2020 ◽  
Vol 49 (6) ◽  
pp. 20190495 ◽  
Author(s):  
Durer Iskanderani ◽  
Mats Nilsson ◽  
Per Alstergren ◽  
Xie-Qi Shi ◽  
Kristina Hellen-halme
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Temporomandibular Joint ◽  
Low Dose ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Sign Test ◽  
Intraobserver Agreement ◽  
Radiographic Findings ◽  
Need To Evaluate

Objective: Evaluation of cone beam CT (CBCT) examination with a low-dose scanning protocol for assessment of the temporomandibular joint (TMJ). Methods: 34 adult patients referred for CBCT imaging of the TMJ underwent two examinations with two scanning protocols, a manufacturer-recommended protocol (default) and a low-dose protocol where the tube current was reduced to 20% of the default protocol. Three image stacks were reconstructed: default protocol, low-dose protocol, and processed (using a noise reduction algorithm) low-dose protocol. Four radiologists evaluated the images. The Sign test was used to evaluate visibility of TMJ anatomic structures and image quality. Receiver operating characteristic analyzes were performed to assess the diagnostic accuracy. κ values were used to evaluate intraobserver agreement. Results: With the low-dose and processed protocols, visibility of the TMJ anatomical structures and overall image quality were comparable to the default protocol. No significant differences in radiographic findings were found for the two low-dose protocols compared to the default protocol. The area under the curves (Az) averaged for the low-dose and processed protocols, according to all observers, were 0.931 and 0.941, respectively. Intraobserver agreement was good to very good. Conclusion: For the CBCT unit used in this study, the low-dose CBCT protocol for TMJ examination was diagnostically comparable to the manufacturer-recommended protocol, but delivered a five times lower radiation dose. There is an urgent need to evaluate protocols for CBCT examinations of TMJ in order to optimize them for a radiation dose as low as diagnostically acceptable (the as low as diagnostically acceptable principle recommended by NCRP).

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