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Benjamin A Thomas, Vesna Cuplov, Alexandre Bousse, Adriana Mendes, Kris Thielemans, Brian F Hutton, Kjell Erlandsson
Positron emission tomography (PET) images are degraded by a phenomenon known as the partial volume effect (PVE). Approaches have been developed to reduce PVEs, typically through the utilisation of structural information provided by other imaging modalities such as MRI or CT. These methods, known as partial volume correction (PVC) techniques, reduce PVEs by compensating for the effects of the scanner resolution, thereby improving the quantitative accuracy. The PETPVC toolbox described in this paper comprises a suite of methods, both classic and more recent approaches, for the purposes of applying PVC to PET data...
November 21, 2016: Physics in Medicine and Biology
Fatma Ahmed, Razi Muzaffar, Hermina Fernandes, Yifan Tu, Batool Albalooshi, Medhat M Osman
OBJECTIVES: The aim of our study is to assess the frequency of detection of PET-positive computed tomography (CT)-negative skeletal metastases (SM) and determine the impact of such detection on staging and/or management in patients who had FDG PET/CT as part of the cancer work-up. METHODS: We retrospectively reviewed 2000 18F-FDG PET/CT scans of known cancer patients. A log was kept to record cases of suspected SM with or without bone changes from the low-dose non-contrast CT...
2016: Frontiers in Oncology
Olympia Koulouri, Andrew C Hoole, Patrick English, Kieren Allinson, Nagui Antoun, Heok Cheow, Neil G Burnet, Neil Donnelly, Richard J Mannion, Mark Gurnell
No abstract text is available yet for this article.
October 21, 2016: Lancet Diabetes & Endocrinology
M Gauthé, N Testart Dardel, C Nascimento, M Trassard, A Banal, J-L Alberini
About one third of focal thyroid uptakes in a fluorodeoxyglucose (FDG) positron emission tomography/computerized tomography (PET/CT) study are malignant, the most frequent histological type being papillary carcinoma. Metastases to the thyroid account for approximately 7.5% of thyroid malignancies and come mainly from kidney, lung, head and neck, and breast cancers. We report the case of a 64-year-old woman presenting a fast growing thyroid nodule whose primitive or metastatic origin was not obvious, for which (18)F-FDG PET/CT helped in the diagnostic process and in the later management of the patient...
October 21, 2016: Revista Española de Medicina Nuclear e Imagen Molecular
M Hocevar, L Lezaic, S Rep, K Zaletel, T Kocjan, M J Sever, J Zgajnar, B Peric
A focused surgical approach based on pre-operative localization replaced the classical four-gland exploration in patients with primary hyperparathyroidism (PHP). Sestamibi scanning and ultrasound are most often used localization modalities with reported sensitivity of 54-100% for identification of single gland disease. The aim of this study was to analyze the results of pre-operative localization with (18)F-Fluorocholine PET/CT (FCh-PET) in patients with PHP. A retrospective review of 151 patients with PHP who underwent surgery after pre-operative localization with FCh-PET was performed...
October 21, 2016: European Journal of Surgical Oncology
Verena Ruhlmann, Marcus Ruhlmann, Alexander Bellendorf, Johannes Grueneisen, Lino M Sawicki, Hong Grafe, Michael Forsting, Andreas Bockisch, Lale Umutlu
PURPOSE: The aim of this study is to evaluate and compare the diagnostic potential of integrated whole-body [18F]FDG-PET/MRI to [18F]FDG-PET/CT for detection of a potential primary cancer and metastases in patients suspected for cancer of unknown primary (CUP). METHODS: A total of 20 patients (15 male, 5 female, age 53±13 years) suspect for CUP underwent a dedicated head and neck & whole-body [18F]FDG-PET/CT (Biograph mCT 128, Siemens Healthcare) and a subsequent simultaneous [18F]FDG-PET/MRI examination (Biograph mMR, Siemens Healthcare)...
November 2016: European Journal of Radiology
Kerim Sonmezoglu, Betul Vatankulu, Tugrul Elverdi, Resit Akyel, Melih E Erkan, Metin Halac, Meltem Ocak, Emre Demirci, Yildiz Aydin
OBJECTIVE: In this observational pilot study, we aimed to evaluate the role of gallium-68-labelled DOTA-TATE (Ga-TATE) PET/computed tomography (CT) scanning in patients with multiple myeloma (MM), considering previous promising results obtained from conventional somatostatin receptor scintigraphy with In pentetreotide. MATERIALS AND METHODS: Twenty-one patients with a diagnosis of MM were prospectively included in this study: eight patients were referred for initial staging and 13 patients for restaging purpose...
October 21, 2016: Nuclear Medicine Communications
Sang Hyun Hwang, Jeong Won Lee, Ho Jin Cho, Kyung Sik Kim, Gi Hong Choi, Mijin Yun
PURPOSE: The aim of this article was to evaluate the prognostic value of metabolic tumor volume (MTV) and total lesion glycolysis (TLG) on preoperative F-FDG PET/CT for predicting intrahepatic recurrence-free survival (IHRFS), extrahepatic metastasis-free survival (EHMFS), and overall survival (OS) in patients with very early/early hepatocellular carcinoma (HCC). PATIENTS AND METHODS: We retrospectively enrolled 132 patients with very early/early HCC who underwent F-FDG PET/CT followed by surgery...
October 21, 2016: Clinical Nuclear Medicine
Isabel Martínez-Rodríguez, Almudena García-Castaño, Remedios Quirce, Julio Jiménez-Bonilla, Ignacio Banzo
We present a 35-year-old woman with left axillary mass. Histopathological analysis revealed metastatic infiltration for BRAF-mutant melanoma. F-FDG PET/CT showed bilateral axillary lymphadenopathy as well as bone and subcutaneous metastases. Dabrafenib (a BRAF inhibitor) and trametinib (a MEK inhibitor) combined therapy was started with a complete metabolic response established by 2 consecutive PET/CT scans. A follow-up PET/CT showed FDG uptake in several subcutaneous nodules in both distal legs, suggesting metastases...
October 21, 2016: Clinical Nuclear Medicine
Jingjie Ge, Chuantao Zuo, Yihui Guan, Zonghui Liang
Primary renal collecting duct carcinoma is an extremely rare neoplasm. We present a case of preoperative collecting duct carcinoma with enhanced MRI and F-FDG PET/CT findings. The MRI and PET imaging showed a round mass in the left kidney, as well as multiple retroperitoneal lesions with slight enhancement and intense FDG uptake, respectively. A left radical nephrectomy was performed. Primary renal collecting duct carcinoma and retroperitoneal lymph node metastases were confirmed histopathologically.
October 21, 2016: Clinical Nuclear Medicine
Joyce Hsu, Leo Jia, Darko Pucar, Hadyn Williams, Jayanth Keshavamurthy
Diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH) is a rare form of preinvasive lung lesion associated with indolent carcinoid tumor formation. This disease is characterized by multiple small pulmonary nodules with low SUVmax on F-FDG PET. Biopsy and immunohistochemical staining for neuroendocrine markers confirm diagnosis. There is no consensus for treatment, which typically involves surgical excision or management of symptoms with steroid-based therapies. We report an unusual case of DIPNECH colocalizing with necrotizing granulomatous inflammation mimicking high-grade aggressive malignancy on FDG-PET and a typical case of DIPNECH for comparison with low FDG avidity...
October 21, 2016: Clinical Nuclear Medicine
Laura Gilardi, Manuela Vadrucci
Isolated splenic metastases from solid malignancies are very rare. We report the case of a 58-year-old woman with isolated metachronous splenic metastasis from colon cancer detected 18 months after colectomy. F-FDG PET/CT allowed its recognition and guided the therapeutic approach toward surgery.
October 21, 2016: Clinical Nuclear Medicine
Tessa Brabander, Jaap Teunissen, Dik Kwekkeboom
PURPOSE: Physiological uptake in the uncinate process or pancreatic head has been described with Ga-labeled PET tracers for somatostatin receptor imaging. In-DTPA-octreotide is the only registered radiopharmaceutical for the imaging of neuroendocrine tumors. We studied the uptake in this region of the pancreatic head on somatostatin receptor scintigraphy (SRS) using In-DTPA-octreotide in a large group of patients. Furthermore, known physiological and clinical characteristics are discussed in an attempt to elucidate this phenomenon...
October 21, 2016: Clinical Nuclear Medicine
Ofer Nathan Gofrit, Stephen Frank, Amichay Meirovitz, Hovav Nechushtan, Marina Orevi
AIM: Castrate-resistant prostate cancer (CRPC) often shows histological evidence of neuroendocrine differentiation (NED). To evaluate the extent of NED in patients with CRPC, we used PET/CT with Ga-[DOTA-Tyr]-octreotate (Ga-DOTA-TATE), a somatostatin analog that binds somatostatin receptor 2 with high affinity. This radiotracer is used in imaging of neuroendocrine tumors. METHODS: Twelve patients (mean age, 65 [SD, 12] years) with CRPC were studied. Their mean prostate-specific antigen level at scanning was 85...
October 21, 2016: Clinical Nuclear Medicine
Florent L Besson, Paul Blanc-Durand, Céline Meyer, Gilles Grimon, Emmanuel Durand
Eumycetoma is a chronic tropical fungal disease that infiltrates subcutaneous tissues, mainly in the feet and legs. Standard antifungal drugs are ineffective, and mutilating surgery is common. Morphological imaging is useful for assessing the local extent of the disease before surgery. FDG PET/CT may be of potential interest for the general extent, but PET descriptions remain scarce and mostly relate to the feet. Here, the authors present FDG PET/CT and MRI study of a very rare case of an extensive, biopsy-proven eumycetoma of the right thigh that was performed to guide potential surgery...
October 21, 2016: Clinical Nuclear Medicine
Jeong Won Lee, Sang Hyun Hwang, Do Young Kim, Kwang-Hyub Han, Mijin Yun
PURPOSE: This study aimed to evaluate the prognostic value of F-FDG uptake of portal vein tumor thrombosis (PVTT) for predicting progression-free survival (PFS) and overall survival (OS) in patients with locally advanced hepatocellular carcinoma (HCC). METHODS: The study retrospectively included 166 HCC patients with PVTT and no extrahepatic metastases who underwent staging FDG PET/CT. Tumor-to-liver uptake ratio (TLR) and PVTT-to-liver uptake ratio (PLR) were measured for each patient, and the prognostic values of clinical factors, TLR, and PLR were assessed...
October 21, 2016: Clinical Nuclear Medicine
Alexis Hugentobler, Laurent Gilbeau, Jean-Noel Talbot, Mathieu Gauthé
Breast cancer is approximately 100 times less common among men. Estrogen-related receptor α was detected in human prostate cancer tissue, and androgen receptors are expressed in both normal and malignant breast tissue. Thus, prostate cancer hormonal therapy may increase breast cancer risk. A 67-year-old man with prostate cancer history presented with rising prostate-specific antigen level. F-Fluorocholine PET/CT showed intense uptake in his right breast and moderate uptake in right axillary lymph node. Complementary F-FDG PET/CT demonstrated more intense tracer uptakes in both the right breast and axillary lymph node...
October 21, 2016: Clinical Nuclear Medicine
Clément Drouet, Olivier Morel, Hatem Boulahdour
FDG PET/CT has high sensitivity and specificity for the detection of distant metastases from cutaneous melanoma. Imaging is recommended for patients with clinical suspicion of metastasis and should be considered for those with confirmed sentinel lymph node metastasis. Metastatic melanoma bears a poor prognosis. Only a complete resection improves survival, which explains the need to detect potentially unresectable disease, and most metastatic patients are ineligible for a curative surgical procedure. Here, FDG PET/CT demonstrated isolated bilateral adrenal metastases from melanoma of unknown primary...
October 21, 2016: Clinical Nuclear Medicine
Fernanda Granato, Andre C Felicio, Lilian Yuri Itaya Yamaga, Solange Amorim Nogueira, Taise Vitor
The liver is the organ most commonly affected by colorectal cancer metastasis. Currently, liver resection is the treatment of choice, but in cases where it is not possible, intensity-modulated radiation therapy is an alternative. We report the case of a 57-year-old woman whose colorectal carcinoma metastasized to the liver. She was referred for implantation of fiducial markers for intensity-modulated radiation therapy planning. PET-CT stands out as an additional tool for distinguishing metabolically active tumor tissue from other tissues, ensuring effective introduction of percutaneous fiducial markers, especially in cases where use of conventional imaging techniques is limited...
October 21, 2016: Clinical Nuclear Medicine
Yu-Yu Lu, Chien-Hsing Lu, Hsin-Yi Wang
Metastatic tumors of the clitoris from cervical carcinoma are extremely rare. Here, we described a 54-year-old woman with clitoral metastasis from cervical carcinoma demonstrated on F-FDG PET/CT images.
October 21, 2016: Clinical Nuclear Medicine
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