(一)冠心病CT检查的适应证 1. 基于常规胸部CT平扫的冠状动脉钙化(coronary artery calcium,CAC)评估适应证:适用于所有肺癌筛查患者和40岁以上未确定冠心病的患者。 2.心电门控冠状动脉钙化积分(coronary artery calcium score,CACS)CT检查适应证:(1)...
A deep learning calcium scoring algorithm for quantification of coronary and thoracic calcium was robust, despite sub stantial differences in CT protocol and variations in subject population. Augmenting the algorithm training with CT protocol–spe cific images further improved algorithm performance. 一个深...
Coronary artery anomalies—both benign and malignant—can be detected with relatively high accuracy on noncontrast-enhanced coronary artery calcium scoring (CCS) studies, according to a study published in the May issue of Academic Radiology.Health ImagingHealth Imaging...
This might obviate the need for a dedicated non-contrast-enhanced CT scan for CAC scoring, which is regularly acquired prior to a CCTA scan, and thus reduce the CT radiation dose received by patients. 展开 关键词: Coronary artery calcifications Automatic calcium scoring Convolutional neural ...
The purpose of this study was to evaluate the impact of spatial resolution on coronary calcium scoring by x-ray CT, to assess the scoring performance of different CT scanners as they are operated in the field and to correct for the effects of CT scanner spatial resolution on coronary calcium...
Negative predictive values decreased from 0.93 to 0.75 for patients with calcium score less than 100 or greater than or equal to 100, respectively (p = 0.053). The authors concluded that both pre-test probability for CAD and coronary calcium scoring should be considered before using CTA for ...
论文题目和原文地址:ImageNet Classification with Deep Convolutional Neural Networksvolu 卷积在三通道上的操作 一般来说有几个卷积核,最终得到的featuremap就有几个。三通道的图片对应的卷积核也是三通道的,三个通道分别卷积之后对应位置相加填在featuremap中。比如上图中最右边的3就是通过三个通道卷积之后得到的。
In this scenario other factors come into play like a much higher pre-test probability [14] and the pathophysiological issues of plaque rupture, non-calcified plaque and thrombotic occlusions, none of which are detected by the calcium score. Therefore, a negative CAC scan cannot be used to rule...
FrequencyOperational Modal Analysis (OMAVibration Based Damage DetectionThis study attempts to apply vibration based damage detection method specifically operational modal analysis (OMA) on fiberglass reinforced epoxy plate. OMA is used on undamaged fiber glass reinforced epoxy plate to extract the modal ...
standard CT only imaging exams as well. The CT scan anatomical imaging can be fused with the nuclear PET imaging to show anatomical landmarks. The CT component can also be used in cardiac PET to perform a coronary calcium scoring exam to offer a risk assessment for future heart attack risk...