One imaging technology that is gaining more widespread use is the combination of single photon emission computed tomography (SPECT) and computed tomography (CT). In the nuclear medicine division atT TrendsW ReadAppliedradiology Com
however, take days to provide the diagnosis, and false negative rate is relatively high. Imaging, in particular chest computed tomography (CT), can assist with diagnosis and assessment of this disease. Nevertheless, it is shown that standard dose CT scan gives significant radiation...
Low-dose CT (LDCT) is a feasible method to reduce the radiation dose to the patient. However, both artifacts and noise appear in the reconstructed images,
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Lung Vessel Enhancement in Low-Dose CT ScansThis paper provides a tutorial and survey for a specific kind of illustrative visualization technique: feature lines. We examine different feature line methods. For this, we provide the differential geometry behind these concepts and adapt this mathematical ...
Scans are considered ‘ultra-low-dose’ if they are <1 mSv; however, these definitions are the subject of debate.41 More scans can be carried out to meet so-called ‘low’ or ‘ultra-low’ dose standards, thanks to improved CT technology, meaning individual scan dose is kept acceptably ...
摘要: 目的对13岁以下的儿童用低剂量螺旋cT头颅扫描,以降低儿童在行CT检查时接收的放射辐射。方法总结69例儿童颅脑CT用三组不同参数扫描。结果在管电流80mAs和100mAs,对儿童颅脑扫描,图像显示清晰,噪声低,扫描信息完整。在管电流为50mAs儿童年龄小于3岁时,也能达到上述效...
(incidence results) which more likely reflect the true potential of low-dose CT screening as findings at the initial (baseline) CT are influenced by chance (study design can not control whether the first CT scan in a lung cancer patient is performed only days or rather years before symptoms ...
[Hu Chen et., al] Low-Dose CT With a Residual Encoder-Decoder Convolutional Neural Network (RED-CNN) 1 文章核心思想 低剂量CT重建问题是近年以来在生物医学图像领域有一定研究价值的topic,传统算法包括频率域滤波算法以及迭代重建算法,二者共同的问题是需要对raw data进行运算,相对的复杂度较高。随着深度学习...
低剂量CT 1. Analytical noise treatment for low-dose CT projection data by penalized weighted least-square smoothing in the K-L domain; 利用K-L域惩罚加权最小均方平滑对低剂量CT投影数据进行噪声滤除(英文) 2. Low-dose CT can screen more patients in early stage, however, overdiagnosis, cost an...