scholarly journals Additive value of positron emission tomography/computed tomography scan for detection of aortic tube graft infection: a case report

2020 ◽  
Author(s):  
Farnoosh Larti ◽  
Mohammad Amin Khadembashiri ◽  
Mehrshad Abbasi ◽  
Alborz Sherafati
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Diagnostic Accuracy ◽  
Ct Scan ◽  
Graft Infection ◽  
Emission Tomography ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
Pet Ct Scan

Abstract Background Diagnosis of aortic graft infection is challenging, and delayed diagnosis is associated with poor prognosis. Positron emission tomography/computed tomography (PET/CT) has improved diagnostic accuracy. Case summary A patient with a history of congenital heart disease was admitted due to fever. He had a history of four cardiac surgeries, including the Bentall procedure for endocarditis. Blood cultures were negative. A semi-mobile mass was detected in the distal portion of the aortic tube graft in echocardiography. PET/CT scan was used to confirm tube graft infection and to support proceeding to cardiac surgery. Discussion Using multimodality imaging, including PET/CT scan in combination with echocardiography, can improve diagnostic accuracy for the detection of aortic tube graft infection, infection of prosthetic valves, or intra-cardiac devices, especially in high-risk surgical cases.

Clinical Value of 18F-Fluorodeoxyglucose Positron Emission Tomography/Computed Tomography in Upper Tract Urothelial Carcinoma: Impact on Detection of Metastases and Patient Management

2015 ◽  
Vol 96 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Hajime Tanaka ◽  
Soichiro Yoshida ◽  
Yoshinobu Komai ◽  
Yasuyuki Sakai ◽  
Shinji Urakami ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Diagnostic Accuracy ◽  
Urothelial Carcinoma ◽  
Patient Management ◽  
Upper Tract Urothelial Carcinoma ◽  
Emission Tomography ◽  
Positron Emission ◽  
Pet Ct ◽  
18F Fdg

Objective: To determine the diagnostic accuracy of 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) for detecting metastasis and its impact on patient management with upper tract urothelial carcinoma (UTUC). Patients and Methods: Consecutive patients with UTUC underwent 18F-FDG PET/CT after CT for initial staging (n = 47) and for restaging at recurrence (n = 9). Diagnostic accuracy for detecting metastases with PET/CT and CT was compared statistically. The impact of PET/CT on patient management was assessed by comparing questionnaires that were completed by the attending physicians before and after PET/CT. Results: In the lesion-based analysis, 142 lesions were diagnosed as metastases. The sensitivity of PET/CT was significantly better than that of CT (85 vs. 50%, p = 0.0001). In the patient-based analysis, 22 patients were diagnosed as having metastases. The sensitivity/specificity/accuracy of PET/CT tended to be superior to those of CT, but these values were not significantly different (95, 91, and 93% vs. 82, 85, and 84%; p = 0.25, 0.50, and 0.063, respectively). The clinicians changed their assessments of disease extent and management plans in 18 (32%) and 11 (20%) patients, respectively, based on the PET/CT results. Conclusions: The diagnostic accuracy of PET/CT for detecting metastasis was superior to that of CT. PET/CT provided additional information to the CT-based staging, which had an impact on patient management.

scholarly journals Physiological Appearance of Hybrid FDG–Positron Emission Tomography/Computed Tomography Imaging Following Uncomplicated Endovascular Aneurysm Sealing Using the Nellix Endoprosthesis

2020 ◽  
Vol 27 (3) ◽  
pp. 509-515
Author(s):  
Erik Groot Jebbink ◽  
Leo H. van Den Ham ◽  
Beau B. J. van Woudenberg ◽  
Riemer H. J. A. Slart ◽  
Clark J. Zeebregts ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Fdg Pet ◽  
Graft Infection ◽  
Emission Tomography ◽  
Visual Examination ◽  
Fdg Uptake ◽  
Positron Emission ◽  
Pet Ct ◽  
Fdg Pet Ct

Purpose: To investigate the physiological uptake of hybrid fluorine-18-fluorodeoxyglucose (FDG)–positron emission tomography/computed tomography (PET/CT) before and after an uncomplicated endovascular aneurysm sealing (EVAS) procedure as a possible tool to diagnose EVAS graft infection and differentiate from postimplantation syndrome. Materials and Methods: Eight consecutive male patients (median age 78 years) scheduled for elective EVAS were included in the prospective study ( ClinicalTrials.gov identifier NCT02349100). FDG-PET/CT scans were performed in all patients before the procedure and 6 weeks after EVAS. The abdominal aorta was analyzed in 4 regions: suprarenal, infrarenal neck, aneurysm sac, and iliac. The following parameters were obtained for each region: standard uptake value (SUV), tissue to background ratio (TBR), and visual examination of FDG uptake to ascertain its distribution. Demographic data were obtained from medical files and scored based on reporting standards. Results: Visual examination showed no difference between pre- and postprocedure FDG uptake, which was homogenous. In the suprarenal region no significant pre- and postprocedure differences were observed for the SUV and TBR parameters. The infrarenal neck region showed a significant decrease in the SUV and no significant decrease in the TBR. The aneurysm sac and iliac regions both showed a significant decrease in SUV and TBR between the pre- and postprocedure scans. Conclusion: Physiological FDG uptake after EVAS was stable or decreased with regard to the preprocedure measurements. Future research is needed to assess the applicability and cutoff values of FDG-PET/CT scanning to detect endograft infection after EVAS.

scholarly journals Imaging for biopsies

2018 ◽  
Vol 5 (11) ◽  
pp. 4988
Author(s):  
Musaad AlBalood ◽  
Mohammed Almeshal
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Diagnostic Accuracy ◽  
Imaging Technique ◽  
Ct Imaging ◽  
The Other ◽  
Emission Tomography ◽  
Advanced Technique ◽  
Positron Emission ◽  
Pet Ct

Positron emission tomography/computed tomography (PET/CT) imaging technique is considered to be an advanced technique that emerged recently and has been successfully used to guide several procedures like obtaining biopsies and ablating tumors. In this review, we will thoroughly discuss the indications, uses, and advantages of guiding biopsies with PET/CT techniques, with main focus on the field of oncology. PET/CT techniques are considered to be emerging imaging modalities that have significantly improved diagnostic accuracy of biopsies. The most important advantage of using PET/CT imaging to guide biopsies is its ability to provide accurate visualization of the lesion, with immediate assessment of the procedure following its end. On the other hand, this technique still has some limitations. Most importantly, the significant exposure to radiation to both the patient and the physician.  

scholarly journals The use of PET/CT in pregnancy: A case report of malignant parathyroid carcinoma and a review of the literature

2017 ◽  
Vol 11 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Manpreet (Mona) Gill ◽  
Winnie Sia ◽  
Michael Hoskinson ◽  
Erin Niven ◽  
Rshmi Khurana
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Parathyroid Carcinoma ◽  
Emission Tomography ◽  
Positron Emission Tomography Scanning ◽  
Healthy Baby ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of ◽  
In Pregnancy

Positron emission tomography scanning is not commonly performed in pregnancy but can be done if required. Fetal doses of radiation can be minimized, and our case exemplifies the safe application of positron emission tomography/computed tomography in pregnancy. A 38-year-old woman in her first ongoing pregnancy presented at 28 weeks’ gestation with symptomatic hypercalcemia. Given a history of parathyroid carcinoma, recurrence was suspected. Ultrasound and magnetic resonance imaging failed to locate the lesion. However, positron emission tomography/computed tomography identified a culprit supraclavicular lymph node. This was excised under local anesthesia resulting in normalization of parathyroid hormone and calcium levels. A term, healthy baby was delivered. The literature provides support that the use of positron emission tomography/computed tomography is acceptable when indicated, and there are modifications to protocols that can further limit risk.

scholarly journals Neurosarcoidosis Pathologically Diagnosed Via Biopsy of a Normal-Sized Inguinal Lymph Node With Fluorodeoxyglucose Accumulation on Positron Emission Tomography/Computed Tomography in a Patient With a History of Brain Ewing’s Sarcoma

2021 ◽  
Author(s):  
Masayuki Fuwa ◽  
Shodai Tateyama ◽  
Ayaka Kato ◽  
Motochika Asano ◽  
Koichiro Taguchi ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Positron Emission Tomography ◽  
Lymph Node ◽  
Ewing’S Sarcoma ◽  
Ewing's Sarcoma ◽  
Inguinal Lymph Node ◽  
Emission Tomography ◽  
Positron Emission ◽  
Pet Ct ◽  
History Of

Abstract Neurosarcoidosis is a rare disease and is often difficult to diagnose. Herein, we report a case of neurosarcoidosis in a patient with a history of Ewing’s sarcoma of the brain. He presented with fever of unknown origin, and a pathological diagnosis was obtained via biopsy of a normal-sized inguinal lymph node with fluorodeoxyglucose (FDG) accumulation on positron emission tomography/computed tomography (PET/CT). The condition could not have been diagnosed without FDG-PET/CT.

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