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CT - Europe PMC

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Last Updated: 23 July 2022

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Corrective osteotomy for complex tibial deformity in a patient with hereditary vitamin D-resistant hypophosphatemic rickets (HVDRR) using CT-based navigation system and 3D printed osteotomy model.

Planning a three-dimensional osteotomy using computed tomography data is particularly useful in cases of complex deformities. However, one drawback in using navigation devices is that osteotomies are performed on tracker-attached bone, but bone fragments on the other side that were cut away cannot be traced. An adult man with a difficult tibial deformity and intramedullary nail fixation case of hereditary vitamin D-resistant hypophosphatemic rickets used these methods to treat segmental corrective osteotomy for a complicated tibial deformity with intramedullary nail fixation. To shield the thin and stretched skin around the deformed tibia, we decided to use an IMN for correction and fixation of tibial deformity. In addition, we could ensure an accurate preparation of closed medullary canal for the IMN placement by referring to the 3D printed bone models. The bone union at the osteotomy sites had been confirmed, and the patient was able to return to his normal life and work six months after the operation.

Source link: https://europepmc.org/article/MED/35727185


Retrospective analysis of the 18F-FDG PET/CT cutoff value for metabolic parameters was performed as a prediction model to evaluate risk factors for endometrial cancer.

Purpose: The research was retrospectively reviewed the validity and predictive ability of preoperative integrated whole-body 18 F-FDG PET/CT for the detection of high-risk factors in patients with endometrial carcinoma. Materials and methods A retrospective review of 205 patients with histologically curettage-confirmed endometrial cancer who underwent preoperative PET/CT at Shanghai General Hospital from January 2017 to December 2019 was retrospectively assessed. To preoperatively predict DMI, ESI, and LNM in endometrial carcinoma patients, the present research revealed a risk model based on optimal cutoff values for MTV and TLG of 19. 6 ml/126. 3 g, 20. 54 ml/49. 83 g, and 24 ml/49. 83 g. Patients with MTV >= 19. 6 ml of MI and PET-positive LN with MTV cutoff >= 24 ml predicted poor OS and PFS with MTV cutoff >= 24 ml, leading to poor OS and PFS. Patients with MTV >= 19. 6 ml of MI and PET-positive LN with MTV cutoff >= 24 ml tended to expect poor OS and PFS.

Source link: https://europepmc.org/article/PPR/PPR522114


Spectral CT - a new supplementary method for preoperative assessment of pathological grades of esophageal squamous cell carcinoma

Background: Spectral CT imaging techniques have been shown to be effective in the differentiation of pathological grades in various malignancies. Methods This study aims to investigate the use of spectral CT in the quantitative evaluation of esophageal squamous cell carcinoma with varying degrees of differentiation from June 2018 to March 2020 retrospectively enrolled. The diagnostic results of these parameters in poorly differentiated groups and non-poorly classified groups were used to determine their diagnostic success in poorly differentiated groups and non-poorly defined groups. In the ROC report, IC did the best job in identifying the poorly defined group and the non-poorly identified group in VP naming the poor differentiated group and the non-poorly identified group. Conclusions Quantitative characteristics of spectral CT may provide additional details for the preoperative differential diagnosis of ESCC with different degrees of differentiation.

Source link: https://europepmc.org/article/PPR/PPR522056


Can small-field-of-view reconstruction CT better evaluate lung nodule than conventional CT analyzed by multi-instance learning lung nodule system ?

Background: To subjectively and objectively assess the success of conventional CT and small-field-of-view reconstruction CT by radiologists and a multi-instance learning based lung nodule device. To determine their difference, the c-CT and sFOV-CT were objectively investigated by the N a lung nodule unit based on MIL. Conclusions Between c-CT and sFOV-CT, a subjective analysis by two radiologists showed that only the features of minimal CT value were statistically significant between c-CT and sFOV-CT. While the most notable difference between c-MIL and sFOV-MIL was due to the MIL's objective investigation, the most important aspects, including nodule type, location, size, mean CT value, and vaping sign, were found statistical differences between c-MIL and sFOV-MIL. The difference between c-CT and sFOV-CT was no statistical significance, but the CNR-nodule showed statistical difference, and the CNR-lung CNR-CT's CNR-lung had no statistical significance, and the CNR-lung CNR had no statistical significance, while sFOV-CT's CNR-lung had no statistical significance, and the CNR-nodule had a higher CNR was higher than that of c-CT'sFOV-CT and c-CT'sFOV-CT'sFOV-CT-CT-CT-CT-CT'sFOV-CT'sFOV-CT'sCNR-CT's CNR-CT's CNR-CT'sCNR-CT's CNR-CT's CNR-CT's's CNR-CT's CNR-CT'sCRAV-CT's CNR-CT's-CT's The image quality of those two CT images was different, and the CNR-nodule of sFOV-CT was higher than that of c-CT, according to the CNR-nodule of sFOV-CT.

Source link: https://europepmc.org/article/PPR/PPR521940


PET/CT of cranial arteries for a sensitive diagnosis of giant cell arteritis.

Objects: To analyze the results of cranial PET/CT for the diagnosis of giant cell arteritis, please refer to the following links. Methods All patients with a suspected diagnosis of GCA were prospectively enrolled in this research and had a digital PET/CT with analysis of cranial arteries if they had not started glucocorticoids more than 72 hours earlier. After at least six months of therapy, the patient went into remission after at least six months of therapy, with GCA as the result.

Source link: https://europepmc.org/article/MED/35866984


Intraoperative cone-beam CT during the transjugular intrahepatic portosystemic shunt procedure

During the transjugular intrahepatic portosystemic shunt procedure, it was difficult to determine portal vein entry by intraoperative cone-beam CT. The number of punctures and PV puncture times in the CBCT group was less than and min in the DSA group, respectively, and PV entry scoring was higher in the CBCT group. PV entry for several difficult TIPS procedures can be identified with some challenging TIPS procedures, but results in increased radiation exposure.

Source link: https://europepmc.org/article/PPR/PPR522399


Comparison of 3D Quantitative Osteoarthritis Imaging Biomarkers from Paired CT and MR Images: data from the IMI-APPROACH study

In DMOAD clinical trials, quantitative endpoints such as MRI bone surface area and femoral bone shape measurements have been used. Because of the high bone-soft tissue contrast, computerized Tomography imaging is more widely used for 3D rendering of bony anatomy. We set out to compare CT and MRI results of 3D imaging biomarkers in CT and MRI tests. Femur and tibia were automatically segmented using advanced appearance tools to determine 3D bone shape, area, and 3D joint space width. Discussion: Using either modality or not, the strong correlation and low B-score bias means that B-score results can be determined consistently. The bone surface determined using MR and CT is expected to be in slightly different locations within the bone/cartilage boundary. The negative bone area bias indicates that the MR bone boundary lies within the CT boundary, which results in smaller MR regions, consistent with the positive 3DJSW's positive 3DJSW approach.

Source link: https://europepmc.org/article/PPR/PPR522300


Lipid but not glucose metabolism is associated with 18FDG-PET/CT false negative lymph nodes in head and neck cancer

Background: Lymph node metastasis is common in head-neck cancer patients, and [18 F] fluorodeoxyglucose positron emission tomography for lymph node metastasis may lead to false alarm and delays in post-treatment. As CD36 IHC score of primary lesions was significantly higher in the false negative group than the true positive group, we found that CD36 and GLS in primary lesions were also useful biomarkers for distinguishing false negative nodes.

Source link: https://europepmc.org/article/PPR/PPR522261


Detection of lymph node metastases in patients with prostate cancer: comparing conventional and digital [ 18 F]-fluorocholine PET-CT using histopathology as a reference.

Background Among prostate cancer patients with metastatic lymph nodes detected and staged by ultrasound-computed tomography [18 F]-fluorocholine is used to detect and stage metastatic lymph nodes in patients with prostate cancer. For FCH, we compared the possibility of finding regional lymph node metastases using conventional and digital silicon photomultiplier -based PET-CT methods. Histopathology was used as a reference method for extended pelvic lymph node dissection histopathology. Methods The study, conducted retrospectively, looked at 177 patients with intermediate or high risk prostate cancer who had undergone treatment with FCH PET-CT before ePLND. Photographs were obtained with either the standard Philips Gemini PET-CT or the new SiPM-based GE Discovery MI PET-CT or both. Images obtained using the Philips Gemini PET-CT device showed 19 patients with alleged lymph node metastases, while GE Discovery MI PET-CT reported 36 such patients. In a receiver operating characteristic curve review, the curves were similar between the two PET-CT systems, which were similar.

Source link: https://europepmc.org/article/MED/35866190


Impact of the Canadian CT head rule supplemented by the original published minimum inclusion criteria to assist emergency department clinicians' assessment of patients presenting post fall from residential aged care: a retrospective audit.

Background Ances of a head injury scan A large number of CT brain scans have been ordered in the ED for older patients with a confirmed or potential head injury, but no evidence of a head injury have been identified. This report was intended to analyze the effect of the Canadian CT head rule supplemented by the original published minimum inclusion criteria to help clinicians determine the need for CTB after a minimal trauma reduction in patients presenting from residential aged care facilities to a large metropolitan emergency department. Conclusions: The CCHR supplemented by the original published minimum inclusion criteria in this series appeared to significantly reduce the number of CTB scans done in residential aged care facility residents who were referred to an ED after a fall, with no reported adverse outcomes.

Source link: https://europepmc.org/article/MED/35864470

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions