Triple-sensitivity high-spatial-resolution X-ray computed tomography using a cadmium-telluride detector and its beam-hardening effect.
Triple-sensitivity high-spatial-resolution X-ray computed tomography using a cadmium-telluride detector and its beam-hardening effect. Appl Radiat Isot. 2020 May;159:109089 Authors: Yoshida S, Sato E, Oda Y, Yoshioka K, Moriyama H, Watanabe M Abstract To observe blood vessels at high contrasts, we constructed a first-generation triple-sensitivity X-ray computed tomography (TS-CT) scanner using a cadmium-telluride (CdTe) detector and a triple-amplifying system. X-ray photons are absorbed by the CdTe crystal, and the electric charges produced by photons are converted into voltages using a current-to-voltage (I-V) amplifier, and the I-V output is amplified by a voltage-to-voltage (V-V) amplifier. The V-V output 1 is sent to a dual V-V amplifier through a 5.0-m-length coaxial cable and amplified to two-different outputs of 2 and 3. The three outputs 1-3 are sent to a personal computer through an analog-to-digital converter to reconstruct three tomograms simultaneously. In the TS-CT, the scattering photons from the object are extremely reduced using a 0.5-mm-diameter lead pinhole behind the object. The translation and rotation steps were 0.1 mm and 0.5°, respectively, and the spatial resolutions were 0.25 × 0.25 mm2. The scanning time was 19.6 min, and blood vessels were visible using gadolinium contrast media. In particular, the effective photon energy increased with increasing amplification factor of the amplifier caused b...
Conclusion: COVID-19 mainly affects the lower lobes of the lungs. GGO and consolidation in the lung periphery is the imaging hallmark in patients with COVID-19 infection. Absence of bronchiectasis, solitary nodules, cavitation, calcifications, tree-in-bud appearance, and reversed halo-sign indicates that these features are not common findings, at least in the earlier stages. PMID: 32440666 [PubMed]
Conclusions: Available data showed that pregnant patients in late pregnancy had clinical manifestations similar to non-pregnant adults. It appears that the risk of fetal distress, preterm delivery and prelabor rupture of membranes (PROM) rises with the onset of COVID-19 in the third trimester of pregnancy. There is also no evidence of intrauterine and transplacental transmission of COVID-19 to the fetus in the third trimester of pregnancies. PMID: 32440660 [PubMed]
ConclusionsThe restaging of patients who had ER-positive primary breast cancer and present with recurrent disease may include [18F]FES PET/CT as an initial test when standard imaging studies are equivocal or suspicious.
CONCLUSION: With more affordable 3D printing, this technology may potentially improve patient care and patient education, allowing clinicians and patients to develop a personalized irrigation strategy and have visual confirmation. PMID: 32441708 [PubMed - as supplied by publisher]
According to this study: In asymptomatic adults, fully automated quantitative tissue biomarkers derived from computed tomography (CT) scans can perform better than established clinical parameters in predicting future cardiovascular events and overall survival.These data support the added value of abdominal CT scans performed for other indications.
CONCLUSIONS: Evidence of posterior cerebral artery hyperdensity is a rare radiological finding associated with an increased volume of ischaemic stroke. A computed tomography scan of the head in the acute phase is essential to try to clarify its causation. Calcium emboli are an under-diagnosed cause of stroke and occur spontaneously in a large proportion of cases. If calcium embolism is suspected, a study must be conducted in search of a carotid, valvular or aortic arch pathology. Migration of the arterial hyperdensity towards distal is associated with a better prognosis. This case presented good progress in contrast to the...
Conclusion The preoperative prediction of lymph node status by computer tomography is limited. A decision for or against lymphadenectomy should not be made solely on the basis of this approach. PMID: 32435068 [PubMed]
This study explored patient experience of MR treatment planning scans in addition to a CT scan.
ConclusionOur medical DECT algorithm and prediction model can readily detect and distinguish our range of explosives on the human body. This would avoid possible endangering of DVI staff.
This case report describes a 26-year-old male who presented with anterior chest pain after weightlifting at the gym. Point-of-care ultrasound was used to diagnose a sternal fracture, which was then confirmed on CT scan. This rare mechanism of sports related sternal fracture is discussed, as well as a review of the literature. The use of ultrasound for this application is also explored.