Abdominal imaging
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To evaluate the efficacy of a knowledge-based iterative model reconstruction (IMR) algorithm for reducing image noise in ultralow-dose (ULD) CT for urolithiasis. ⋯ Despite a significant radiation dose reduction, ULD-IMR images were comparable in image quality and noise to RD-FBP images. Furthermore, the diagnostic performance of the ULD non-enhanced CT protocol was comparable to that of the RD scan for diagnosing urinary stones larger than 3 mm.
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To investigate the feasibility, strategy, and long-term outcome of percutaneous recanalization for combined-type Budd-Chiari syndrome (BCS). ⋯ Percutaneous recanalization is suitable for most combined-type BCS patients. Treatment strategy can be made according to the situation of AHV. If the patient has the patent AHV, single IVC recanalization is enough. Otherwise, combined IVC and HV recanalization should be performed.
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To compare radiation dose and image quality in regular, low, and ultralow-dose CT protocols, and to evaluate diagnostic performance of low-dose CT for urolithiasis. ⋯ The knowledge-based IR can provide a better quality image while reducing radiation exposure under the same protocol. Furthermore, the diagnostic performance of the low-dose CT protocol is comparable to the regular dose scan.
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The purpose of the study is to evaluate the influence of the adaptive iterative dose reduction (AIDR 3D) algorithm on the detectability of low-contrast focal liver lesions (FLLs) and the radiation dose repeatability of automatic tube current modulation (ATCM) in abdominal CT scans using anthropomorphic phantoms. ⋯ By applying AIDR 3D, half-dose CT scans may be achievable in small-sized patients without hampering diagnostic performance, while it may improve diagnostic performance in medium- and large-sized patients without increasing the radiation dose.
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Current imaging procedures for prostate cancer including positron emission tomography (PET) exhibit considerable limitations and are not always able to meet the diagnostic needs. Recently, a (68)Gallium-labeled ligand of the prostate-specific membrane antigen ((68)Ga-PSMA) has been introduced in PET-imaging of prostate cancer with first promising results. ⋯ Together with the novel development of combined PET/MRI, the combination of excellent morphological detail, multiparametric functional information, and molecular PET data might lead to a significant improvement in detection of prostate cancer. We present an exemplarily case of primary staging using multiparametric (68)Ga-PSMA PET/MR by combining molecular and structural information.