Publications by authors named "Yukie Kobayashi"
Article Synopsis
- The study analyzed the effects of bolus tracking (BT) on radiation dose, image quality, and vascular enhancement in cardiac CT angiography for infants with congenital heart disease.
- Key measurements included volume CT dose index (CTDIvol), dose length product (DLP), and effective dose, with results showing lower radiation exposure in CCTA without BT methods.
- No significant differences were found in vascular enhancement, image noise, or contrast-to-noise ratio, indicating that CCTA without BT can still provide high-quality images while minimizing radiation exposure.
[Coronary Artery Visualization by Using the 64-row MDCT in Pediatric Patients].
Nihon Hoshasen Gijutsu Gakkai Zasshi
August 2022
Purpose: We retrospectively evaluated the visualization of pediatric coronary computed tomography angiography (CCTA) images by using the 64-detector row CT scanner between the electrocardiogram-gated helical scan and non-electrocardiogram-gated helical scan.
Methods: From January 2015 to March 2019, 100 children who underwent CT angiography examination were retrospectively enrolled. Group A consisted of 50 patients with electrocardiogram-gated helical scan.
ST-segment elevation myocardial infarction (STEMI) can be caused by coronary artery vasospasm (VSA) due to endothelial dysfunction. However, the clinical role of endothelial function tests in VSA-induced STEMI is not fully understood. We present the case of a 43-year-old woman with atypical chest pain and no coronary risk factors.
View Article and Find Full Text PDF[New Potential Method for Optimizing the ATCM Technique in Pediatric CT Examination].
Nihon Hoshasen Gijutsu Gakkai Zasshi
September 2020
Purpose: To compare the radiation dose and image quality using the conventional method for performing the front and side scout view and a new method for performing the side scout view, and then correct the table height at the scan isocenter and perform the front scout view.
Methods: We retrospectively analyzed fifty-six children who had underwent computed tomography (CT) examination between June 2014 and August 2018. We divided them into two groups.
[Comparison of Contrast Enhancement between Bolus-tracking and Test-bolus Methods on Coronary CT Angiography].
Nihon Hoshasen Gijutsu Gakkai Zasshi
September 2020
Purpose: To compare the contrast enhancement between bolus-tracking (BT) and test-bolus (TB) methods in coronary computed tomography angiography (CCTA).
Method: We enrolled 300 patients who underwent CCTA by BT (245 mg I/kg main bolus) or TB (77.4 mg I/kg test bolus with 245 mg I/kg main bolus) methods.
Purpose: A three-dimensional (3D) image from computed tomography (CT) angiography is a useful method for evaluation of complex anatomy such as congenital heart disease. However, 3D imaging requires high contrast enhancement for distinguishing between blood vessels and soft tissue. To improve the contrast enhancement, many are increasing the injection rate.
View Article and Find Full Text PDFObjective: The current Medical Treatment and Supervision Act places a burden on designated psychiafric hospitals with forensic wards. We aimed to clarify the rate of discharge beyond the jurisdictional catchment area, for which overnight training becomes quite cost-ineffective, as hospital staff must accompany the patients home.
Subjects: On September 30, 2008, there were 16 designated hospitals in Japan, and 447 inpatients in these hospitals.