scholarly journals Abstract No. 505 Validating the registration accuracy of a multimodal registration device to enhance computed tomography–guided percutaneous biopsy and ablation procedures

2021 ◽  
Vol 32 (5) ◽  
pp. S132
Author(s):  
N. Gowda ◽  
S. Gutti ◽  
D. Iyer ◽  
T. Nguyen ◽  
K. Sharma ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Percutaneous Biopsy ◽  
Registration Accuracy ◽  
Multimodal Registration

scholarly journals Application of treatment planning system assisted large-aperture computed tomography simulator in percutaneous biopsy: initial experience by a radiation therapist

2020 ◽  
Author(s):  
Xiaoyi Lin ◽  
Jun-qiang Hong ◽  
Shui-ying Luo ◽  
You-qun Lai ◽  
Yong-liang Dai ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Success Rate ◽  
Treatment Planning ◽  
Percutaneous Biopsy ◽  
Lymph Node Biopsy ◽  
Planning System ◽  
Treatment Planning System ◽  
Initial Experience ◽  
Ct Guided ◽  
Large Aperture

Abstract Background and purpose To evaluate the application of treatment planning system (TPS) assisted large-aperture computed tomography (CT) simulator in percutaneous biopsy, and report our initial experience of the accuracy and safety of this procedure.Methods From November 2018 to December 2019, treatment planning system assisted large-aperture CT simulator guided percutaneous biopsy was performed on 38 cases, with 34 of percutaneous lung biopsy, three of abdominal lesions biopsy, and one case of deep supraclavicular lymph node biopsy. The major results including planned and actual puncture parameters, the success rate, pathological information and complications were recorded. The analyses of puncture accuracy were accomplished by pared-t test and Wilcoxon rank sum test. And the risk factors of puncture accuracy and complications were further identified.Results The entire cohort achieved one-time success of biopsy. No significant differences were presented between planned and actual puncture depth and direction (P = 0.436 and 0.382), indicating the precision of the process. And the pulmonary puncture location was related to the accuracy of puncture direction (P = 0.033). Biopsy specimens were successfully obtained in 38 cases. The diagnostic rate of malignancy was 76%, of which 80% for initial treatment group and 69% for treated group, respectively. For patients with pulmonary biopsy, 12 had minor pneumothorax and 2 progressed to massive pneumothorax. Only three cases suffered needle track bleeding, and no other complications were observed. Additionally, the regression analysis found a significant correlation between puncture angle and the incidence of pneumothorax (P = 0.027).Conclusions TPS assisted large-aperture CT simulator improved the procedure of percutaneous biopsy by combining the advantages of radiotherapy specialty. The initial results suggested the increase of puncture accuracy and success rate, with satisfactory safety simultaneously. It might offer new insights into the field of CT-guided percutaneous biopsy.

scholarly journals Diferencijalna dijagnoza tumorskih promena bubrega malih dimenzija

2007 ◽  
Vol 54 (3) ◽  
pp. 87-92
Author(s):  
B.B. Markovic ◽  
Z. Markovic ◽  
R. Maksimovic ◽  
T. Pejic ◽  
V. Stojanovic
Keyword(s):  
Magnetic Resonance Imaging ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Retrospective Analysis ◽  
Ultrasound Examination ◽  
Percutaneous Biopsy ◽  
Intravenous Urography ◽  
Kidney Tumor ◽  
Resonance Imaging ◽  
Surgical Preparation

The paper is aimed at presenting several patients treated at the CCS Institute of Urology and Nephrology using the retrospective analysis, in whom differentiation of the kidney tumor change nature and size smaller than 3 cm were decisive for further treatment. Similar cases were not reported or were reported exceptionally rarely in the literature. The diagnosis was established based on ultrasound examination, intravenous urography, computed tomography, magnetic resonance imaging as well as angiography, percutaneous biopsy and pathohistological analysis of the surgical preparation.

scholarly journals Detection of additional primary malignancies: the role of CT and PET/CT combined with multiple percutaneous biopsy

2019 ◽  
Vol 52 (3) ◽  
pp. 166-171 ◽  
Author(s):  
Tiago Kojun Tibana ◽  
Rômulo Florêncio Tristão Santos ◽  
Adalberto Arão Filho ◽  
Bernardo Bacelar ◽  
Leticia de Assis Martins ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Fdg Pet ◽  
Percutaneous Biopsy ◽  
Primary Tumors ◽  
Additional Lesion ◽  
Positron Emission ◽  
Pet Ct ◽  
18F Fdg ◽  
Pathology Reports ◽  
Fdg Pet Ct

Abstract Objective: To evaluate the imaging findings of 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) and computed tomography (CT) in patients with additional primary tumors, correlating the results with those of the method used in order to elucidate the diagnosis and of the pathology reports. Materials and Methods: We retrospectively analyzed the medical records, pathology reports and images of 11 patients who underwent CT, 18F-FDG PET/CT, or both. We included patients with at least two tumors, with confirmed distinct histopathological profiles, at different sites. Patients in whom there was no diagnostic confirmation were excluded, as were those in whom the additional lesion was suspected of being a metastasis of the first. Results: New primary malignancies were identified in 11 patients, one new tumor being found in 10 and two new tumors being found in 1. The confirmed sites of the additional malignancies were the lung, kidney, prostate, jejunum, and breast. Single or multiple percutaneous biopsies were performed in 10 patients, and 1 patient underwent a surgical procedure for diagnostic and therapeutic purposes. The tumors were metachronous in 6 cases and synchronous in 5. Conclusion: CT and 18F-FDG PET-CT combined with multiple percutaneous biopsy could facilitate the diagnosis of additional lesions, thus optimizing the treatment and follow-up of the affected patients.

scholarly journals Effect of Deformation Methods on the Accuracy of Deformable Image Registration From Kilovoltage CT to Tomotherapy Megavoltage CT

2019 ◽  
Vol 18 ◽  
pp. 153303381882118 ◽  
Author(s):  
Wannapha Nobnop ◽  
Imjai Chitapanarux ◽  
Somsak Wanwilairat ◽  
Ekkasit Tharavichitkul ◽  
Vicharn Lorvidhaya ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Nasopharyngeal Carcinoma ◽  
Image Registration ◽  
Deformable Image Registration ◽  
Adaptive Radiotherapy ◽  
Deformation Field ◽  
Registration Accuracy ◽  
Deformation Method ◽  
Computed Tomography Images ◽  
Significant Difference

Introduction: The registration accuracy of megavoltage computed tomography images is limited by low image contrast when compared to that of kilovoltage computed tomography images. Such issues may degrade the deformable image registration accuracy. This study evaluates the deformable image registration from kilovoltage to megavoltage images when using different deformation methods and assessing nasopharyngeal carcinoma patient images. Methods: The kilovoltage and the megavoltage images from the first day and the 20th fractions of the treatment day of 12 patients with nasopharyngeal carcinoma were used to evaluate the deformable image registration application. The deformable image registration image procedures were classified into 3 groups, including kilovoltage to kilovoltage, megavoltage to megavoltage, and kilovoltage to megavoltage. Three deformable image registration methods were employed using the deformable image registration and adaptive radiotherapy software. The validation was compared by volume-based, intensity-based, and deformation field analyses. Results: The use of different deformation methods greatly affected the deformable image registration accuracy from kilovoltage to megavoltage. The asymmetric transformation with the demon method was significantly better than other methods and illustrated satisfactory value for adaptive applications. The deformable image registration accuracy from kilovoltage to megavoltage showed no significant difference from the kilovoltage to kilovoltage images when using the appropriate method of registration. Conclusions: The choice of deformation method should be considered when applying the deformable image registration from kilovoltage to megavoltage images. The deformable image registration accuracy from kilovoltage to megavoltage revealed a good agreement in terms of intensity-based, volume-based, and deformation field analyses and showed clinically useful methods for nasopharyngeal carcinoma adaptive radiotherapy in tomotherapy applications.

C-arm cone-beam computed tomography needle path overlay for percutaneous biopsy of pulmonary nodules

2014 ◽  
Vol 119 (11) ◽  
pp. 820-827 ◽  
Author(s):  
Chiara Floridi ◽  
Alessandra Muollo ◽  
Federico Fontana ◽  
Nicola Rotolo ◽  
Anna Maria Ierardi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Cone Beam Computed Tomography ◽  
Pulmonary Nodules ◽  
Percutaneous Biopsy ◽  
Cone Beam ◽  
Needle Path
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