Dose-length-product determination on cone beam computed tomography through experimental measurements and dose-area-product conversion

2021 ◽  
Author(s):  
Veronica Fransson ◽  
Anders Tingberg
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Experimental Measurements ◽  
Dose Length Product ◽  
Dose Area Product ◽  
Area Product

scholarly journals Quality Control in Dental Cone-Beam Computed Tomography

2021 ◽  
Vol 11 (17) ◽  
pp. 8162
Author(s):  
Jin-Feng Huang ◽  
Xiao-Zhao Chen ◽  
Hong Wang
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Detection Method ◽  
Subjective Evaluation ◽  
Safety Information ◽  
Evaluation Methods ◽  
Cone Beam ◽  
Dose Area Product ◽  
Effective Manner ◽  
Area Product

Poor medical equipment may lead to misdiagnosis and missed diagnosis by doctors, leading to medical accidents. Given the differences in imaging methods, the performance determination method for conventional computed tomography (CT) does not apply to dental cone-beam computed tomography (CBCT). Therefore, a detection method that is more suitable for the characteristics of dental CBCT and more convenient for on-site operation in hospitals needs to be urgently developed. Hence, this study aimed to design a robust and convenient detection method to control the quality of dental CBCT, grasp the safety information of the equipment in a timely and effective manner, discover and evaluate equipment risks, and take reasonable and necessary countermeasures, thereby, reducing the risk of medical malpractice. This study adopted dose-area product to measure dose parameters and used objective quantitative evaluation methods instead of subjective evaluation methods for spatial resolution, contrast-to-noise ratio index, and uniformity. The dental CBCT of 10 dental hospitals and clinics were tested, and the findings revealed that the testing methods used had good accuracy and applicability.

Dose area product in estimation of effective dose of the patients undergoing dental cone beam computed tomography examinations

2018 ◽  
Vol 38 (4) ◽  
pp. 1412-1427 ◽  
Author(s):  
Ivana Kralik ◽  
Dario Faj ◽  
Tomislav Lauc ◽  
Matko Škarica ◽  
Jelena Popić ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Effective Dose ◽  
Cone Beam Computed Tomography ◽  
Cone Beam ◽  
Dose Area Product ◽  
Area Product

Intraoperative completion cone-beam computed tomography for the assessment of residual lesions after primary treatment of proximal venous outflow obstructions

2021 ◽  
pp. 026835552110307
Author(s):  
Domenico Baccellieri ◽  
Luca Apruzzi ◽  
Vincenzo Ardita ◽  
Victor Bilman ◽  
Francesco De Cobelli ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Primary Treatment ◽  
Cone Beam ◽  
Control Group ◽  
Outflow Obstruction ◽  
Venous Outflow ◽  
Residual Stenosis ◽  
Area Product ◽  
Residual Lesions

Objective Report the usefulness of completion cone-beam computed tomography (CBCT) as an adjunct tool during femoro-ilio-caval recanalization post stent placement. Methods Data from patients who underwent complex endovenous recanalization for chronic proximal outflow obstruction from January 2018 to May 2020 were analyzed. Two groups of patients were obtained based on the execution or not of completion CBCT. Outcomes, radiation, and contrast doses in the two groups were compared. Results Fifteen patients (9 female, mean age 46.9 ± 13.3) in the control group and ten patients (7 female, 58.3 ± 14) in the CBCT group were included. In the CBCT group, one patient underwent an intraprocedural revision due to a residual lesion. The median total kerma area product (KAPtotal) and the total volume of contrast injected were not statistically different in the two groups. Conclusions Completion CBCT after endovenous procedures might identify residual stenosis or stent malposition without a significant increase of total contrast injected and KAPtotal.

scholarly journals Air kerma area product in cone beam computed tomography

2015 ◽  
Vol 13 (3) ◽  
pp. 309
Author(s):  
Marcus Vinicius Linhares De Oliveira ◽  
Wilson Otto Gomes Batista ◽  
Maria Rosângela Soares ◽  
Paulo Sergio Flores Campos
Keyword(s):  
Computed Tomography ◽  
Radiation Dose ◽  
Cone Beam Computed Tomography ◽  
Cone Beam Ct ◽  
Cone Beam ◽  
Font Size ◽  
Air Kerma ◽  
Tomography Image ◽  
Reduce Radiation Dose ◽  
Area Product

<p class="MsoNormal" style="margin-bottom: 0.0001pt; text-align: justify;"><strong><em><span style="font-size: 12.0pt; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-ansi-language: EN-US;" lang="EN-US">Objective:</span></em></strong><em><span style="font-size: 12.0pt; font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; mso-ansi-language: EN-US;" lang="EN-US"> to evaluate the influence of FOV in air kerma-area product (KAP) and the constancy of exposure parameters on cone beam computed tomography equipments. <strong>Methodology</strong>: Two cone beam CT (GENDEX CBX 500 and<br /> &nbsp;i-CAT Classic) were used and seven exposures with the following FOVs were performed: (A) 14cm x 8,5cm, (B) 14cm x 6cm, (C) 8,5cm x 8.5cm e (D) 8,5cm x 6cm, for CBX 500; and (E) 14cm x 6.cm, (F) 14cm x 8cm e (G) 14cm x 13cm, for the i-CAT. The technical exposure factors (kV, mA, mAs and voxel), remained constant. The dosimetric evaluation was performed with air KAP meter manufactured by IBA dosimetry, model kerma X plus TinO, positioned at the output of the X-ray beam. To evaluate the constancy of the exposure parameters a semiconductor <br /> (Radcal, Rapidose) fixed in front of the tomography image receptor was used. <strong>Result:</strong> The KAP values ​​obtained ranged between 360.1 mGy.cm&sup2; and 1031.2 mGy.cm&sup2;. The FOV height had a substantial influence on the radiation dose. Repeatability and accuracy of the tube voltage varied less than 10%. <strong>Conclusion</strong>: The radiation dose is directly related to the height and inversely related with the FOV diameter; even within the recommended limits, the percentage variation of repeatability and accuracy of kV, for the tomography equipments tested, points to the regular equipment calibration, in order to reduce radiation dose to the patient to a minimum.</span></em></p>

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report

2019 ◽  
Vol 1 (1) ◽  
pp. 16-18 ◽  
Author(s):  
Norafida Bahari ◽  
Nik Azuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

Value of cone beam computed tomography to evaluate complication of intracranial haemorrhage in endovascular treatment (evt): a case report.

2019 ◽  
pp. 16-18
Author(s):  
Norafida Bahari ◽  
NikAzuan Nik Ismail ◽  
Jegan Thanabalan ◽  
Ahmad Sobri Muda
Keyword(s):  
Computed Tomography ◽  
Arteriovenous Malformation ◽  
Endovascular Treatment ◽  
Cone Beam Computed Tomography ◽  
Diagnostic Value ◽  
Cone Beam ◽  
Brain Arteriovenous Malformation ◽  
Embolic Materials

In this article, we evaluate the effectiveness of Cone Beam Computed Tomography, through a case study, in assessing the complication of intracranial bleeding during an endovascular treatment of brain arteriovenous malformation when compared to Multislice-Detector Computed Tomography performed immediately after the procedure. The image quality of Cone Beam Computed Tomography has enough diagnostic value in differentiating between haemorrhage, embolic materials and the arteriovenous malformation nidus to facilitate physicians to decide for further management of the patient.

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