scholarly journals Radiological Characteristics of Patients With Anti-MDA5–Antibody-Positive Dermatomyositis in 18F-FDG PET/CT: A Pilot Study

2021 ◽  
Vol 8 ◽  
Author(s):  
Heng Cao ◽  
Junyu Liang ◽  
Danyi Xu ◽  
Yinuo Liu ◽  
Yinan Yao ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Fdg Pet ◽  
Inflammatory Myopathy ◽  
Standardized Uptake Value ◽  
Idiopathic Inflammatory Myopathy ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
Pet Ct ◽  
Bilateral Lung ◽  
Fdg Pet Ct

Objective: To elucidate the 18F-fluorodeoxyglucose (FDG) PET/CT characteristics and its prognostic value in the patients with anti-melanoma differentiation associated protein 5 antibody positive (anti-MDA5+) dermatomyositis (DM).Methods: This retrospective cross-sectional study included 26 patients with anti-MDA5+ DM and 43 patients with anti-MDA5 negative (anti-MDA5–) idiopathic inflammatory myopathy (IIM) who were examined by 18F-FDG PET/CT from January 1, 2017 to December 31, 2020. The maximum standardized uptake value (SUVmax) of multiple organs and other clinical characteristics of the patients were measured and analyzed.Results: Compared with the anti-MDA5– group, the patients in the anti-MDA5+ group showed higher bilateral lung SUVmax (p = 0.029), higher SUVmax of spleen (p = 0.011), and bone marrow (p = 0.048). Significant correlations between the spleen SUVmax and serum ferritin levels (r = 0.398, p < 0.001), erythrocyte sedimentation rate (ESR) (r = 0.274, p = 0.023), platelet count (r = −0.265, p= 0.028), myositis disease activity assessment score (r = 0.332, p = 0.005), bone marrow SUVmax (r = 0.564, p < 0.001), and bilateral lung SUVmax (r = 0.393, p < 0.001) were observed.Conclusion:18F-FDG PET/CT was found valuable in quantifying the pulmonary focal inflammation and potentially unveil the distinctive characteristics and pathophysiological mechanisms in the patients with anti-MDA5+ DM.

scholarly journals Revisiting the Marrow Metabolic Changes after Chemotherapy in Lymphoma: A Step towards Personalized Care

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Bingfeng Tang ◽  
Malaykumar M. Patel ◽  
Regina H. Wong ◽  
Daniel Wood ◽  
Christiana O. Wong ◽  
...  
Keyword(s):  
Bone Marrow ◽  
Fdg Pet ◽  
Bone Marrow Involvement ◽  
Standardized Uptake Value ◽  
B Cell Lymphoma ◽  
Metabolic Changes ◽  
Personalized Care ◽  
Pet Ct ◽  
Maximal Standardized Uptake Value ◽  
Fdg Pet Ct

Purpose. The aims were to correlate individual marrow metabolic changes after chemotherapy with bone marrow biopsy (BMBx) for its potential value of personalized care in lymphoma. Methods. 26 patients (mean age, 58 ± 15 y; 13 female, 13 male) with follicular lymphoma or diffuse large B-cell lymphoma, referred to FDG-PET/CT imaging, who had BMBx from unilateral or bilateral iliac crest(s) before chemotherapy, were studied retrospectively. The maximal standardized uptake value (SUV) was measured from BMBx site over the same area on both initial staging and first available restaging FDG-PET/CT scan. Results. 35 BMBx sites in 26 patients were evaluated. 12 of 35 sites were BMBx positive with interval decrease in SUV in 11 of 12 sites (92%). The remaining 23 of 35 sites were BMBx negative with interval increase in SUV in 21 of 23 sites (91%). The correlation between SUV change over the BMBx site before and after chemotherapy and BMBx result was significant (P<0.0001). Conclusions. This preliminary result demonstrates a strong correlation between marrow metabolic changes (as determined by FDG PET) after chemotherapy and bone marrow involvement proven by biopsy. This may provide a retrospective means of personalized management of marrow involvement in deciding whether to deliver more extended therapy or closer followup of lymphoma patients.

Multiple values of 18F-FDG PET/CT in idiopathic inflammatory myopathy

2017 ◽  
Vol 36 (10) ◽  
pp. 2297-2305 ◽  
Author(s):  
Yuan Li ◽  
Yunshan Zhou ◽  
Qian Wang
Keyword(s):  
Fdg Pet ◽  
Inflammatory Myopathy ◽  
Idiopathic Inflammatory Myopathy ◽  
Pet Ct ◽  
18F Fdg ◽  
Fdg Pet Ct

scholarly journals Skeletal Muscle Metrics on Clinical 18F- FDG PET/CT Predict Health Outcomes in Patients with Sarcoma

2018 ◽  
Author(s):  
Brent Foster ◽  
Robert D. Boutin ◽  
Leon Lenchik ◽  
David Gedeon ◽  
Yu Liu ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Health Outcomes ◽  
Fdg Pet ◽  
Cancer Recurrence ◽  
Standardized Uptake Value ◽  
Muscle Area ◽  
Cross Sectional ◽  
Reactive Protein ◽  
Pet Ct ◽  
Fdg Pet Ct

ABSTRACTThe aim of this study was to determine the association of measures of skeletal muscle determined from 18F-FDG PET/CT with health outcomes in patients with soft-tissue sarcoma. 14 patients (8 women and 6 men; mean age 66.5 years) with sarcoma had PET/CT examinations. On CTs of the abdomen and pelvis, skeletal muscle was segmented, and cross-sectional muscle area, muscle volume, and muscle attenuation were determined. Within the segmented muscle, intramuscular fat area, volume, and density were derived. On PET images the standardized uptake value (SUV) of muscle was determined. Regression analyses were conducted to determine the association between the imaging measures and health outcomes including overall survival (OS), local recurrence-free survival (LRFS), distant cancer recurrence (DCR), and major surgical complications (MSC). The association between imaging metrics and pre-therapy levels of serum C-reactive protein (CRP), creatinine, hemoglobin, and albumin was determined. Decreased volumetric muscle CT attenuation was associated with increased DCR. Increased PET SUV of muscle was associated with decreased OS and LRFS. Lower muscle SUV was associated with lower serum hemoglobin and albumin. Muscle measurements obtained on routine 18F-FDG PET/CT is associated with outcomes and serum hemoglobin and albumin in patients with sarcoma.

AB0597 FDG PET-CT versus Temporal Artery Biopsy in Patients Presenting with Gca/Pmr: A Retrospective Cross-Sectional Study

2014 ◽  
Vol 73 (Suppl 2) ◽  
pp. 1003.1-1003
Author(s):  
S.A. Just ◽  
R.A. Gildberg-Mortensen ◽  
R.A. Andreasen ◽  
N. Lomborg ◽  
M.B. Morillon ◽  
...  
Keyword(s):  
Fdg Pet ◽  
Temporal Artery ◽  
Cross Sectional Study ◽  
Temporal Artery Biopsy ◽  
Sectional Study ◽  
Cross Sectional ◽  
Pet Ct ◽  
Fdg Pet Ct

scholarly journals FDG-PET/CT patterns in patients with autoimmune encephalitis: a series of 9 cases

2021 ◽  
Author(s):  
Maria Eduarda Slhessarenko Fraife Barreto ◽  
Guilherme de Carvalho Campos ◽  
Bruna Letícia Ferrari ◽  
Lívia Almeida Dutra
Keyword(s):  
Fdg Pet ◽  
Brain Mri ◽  
Autoimmune Encephalitis ◽  
Albert Einstein ◽  
Cross Sectional Study ◽  
Cognitive Changes ◽  
Cross Sectional ◽  
Pet Ct ◽  
Fdg Pet Ct

Background: Autoimmune encephalitis (AIE) is the main differential diagnosis of infectious encephalitis. Brain MRI is normal in up to 50% of cases and studies indicate that changes in FDG-PET/CT are more frequent and early. Objectives: To describe FDG-PET/CT findings in patients with AIE of Hospital Israelita Albert Einstein (HIAE) from 2015-2020. Design and setting: Retrospective cross-sectional study at HIAE. Methods: Medical records of patients with suspected AIE were reviewed. Laboratory results were compiled, and images were reassessed. Results: Amongst 250 records, we found 7.6% (n=19) of AIE, being 8 seropositive (5 anti-NMDA, 1 anti-CASPR2, 1 anti-MOG, 1 anti-VGKC and 1 anti-LGI1), 5 seronegative and 4 limbic encephalitis. The mean age was 48-22 years, 52% male. In encephalitic patients, the most common manifestations were epilepsy (78%), cognitive changes (63%), and behavioral changes (63%). Only 57% had abnormal MRI. We evaluated 23 PET/CTs at different stages of treatment; of the 9 FDG-PET/CTs performed at initial presentation, 88% were abnormal and 30% had normal MRI. Most frequent patterns found were hypometabolism in frontal (59.1%), temporal (39.1%) and left parietal (39.1%) regions. In follow-up, only 2 patients normalized FDG-PET/CT, with clinical improvement. Conclusions:FDG-PET/CT was altered in 88% of patients. In this series, no typical PET/CT pattern was demonstrated for AIE; the most frequent findings were hypometabolism in cortical areas, which also occur in degenerative diseases. We did not find hypermetabolism, or mixed areas of hypo- and hypermetabolism. The specificity of PET/CT for AIE diagnosis should be evaluated in future studies.

scholarly journals Artificial intelligence could alert for focal skeleton/bone marrow uptake in Hodgkin’s lymphoma patients staged with FDG-PET/CT

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
May Sadik ◽  
Jesús López-Urdaneta ◽  
Johannes Ulén ◽  
Olof Enqvist ◽  
Armin Krupic ◽  
...  
Keyword(s):  
Artificial Intelligence ◽  
Bone Marrow ◽  
Fdg Pet ◽  
Test Group ◽  
Observer Agreement ◽  
Hodgkin's Lymphoma ◽  
Bone Marrow Uptake ◽  
Focal Uptake ◽  
Pet Ct ◽  
Fdg Pet Ct

AbstractTo develop an artificial intelligence (AI)-based method for the detection of focal skeleton/bone marrow uptake (BMU) in patients with Hodgkin’s lymphoma (HL) undergoing staging with FDG-PET/CT. The results of the AI in a separate test group were compared to the interpretations of independent physicians. The skeleton and bone marrow were segmented using a convolutional neural network. The training of AI was based on 153 un-treated patients. Bone uptake significantly higher than the mean BMU was marked as abnormal, and an index, based on the total squared abnormal uptake, was computed to identify the focal uptake. Patients with an index above a predefined threshold were interpreted as having focal uptake. As the test group, 48 un-treated patients who had undergone a staging FDG-PET/CT between 2017–2018 with biopsy-proven HL were retrospectively included. Ten physicians classified the 48 cases regarding focal skeleton/BMU. The majority of the physicians agreed with the AI in 39/48 cases (81%) regarding focal skeleton/bone marrow involvement. Inter-observer agreement between the physicians was moderate, Kappa 0.51 (range 0.25–0.80). An AI-based method can be developed to highlight suspicious focal skeleton/BMU in HL patients staged with FDG-PET/CT. Inter-observer agreement regarding focal BMU is moderate among nuclear medicine physicians.

scholarly journals The role of FDG PET/CT or PET/MRI in assessing response to neoadjuvant therapy for patients with borderline or resectable pancreatic cancer: a systematic literature review

2021 ◽  
Author(s):  
Laura Evangelista ◽  
Pietro Zucchetta ◽  
Lucia Moletta ◽  
Simone Serafini ◽  
Gianluca Cassarino ◽  
...  
Keyword(s):  
Neoadjuvant Therapy ◽  
Fdg Pet ◽  
Standardized Uptake Value ◽  
Response To Therapy ◽  
Ductal Adenocarcinoma ◽  
Resectable Pancreatic Cancer ◽  
Number Of Patients ◽  
Pet Ct ◽  
Fdg Pet Ct

AbstractThe aim of the present systematic review is to examine the role of fluorodeoxyglucose (FDG) positron emission tomography (PET) associated with computed tomography (CT) or magnetic resonance imaging (MRI) in assessing response to preoperative chemotherapy or chemoradiotherapy (CRT) for patients with borderline and resectable pancreatic ductal adenocarcinoma (PDAC). Three researchers ran a database query in PubMed, Web of Science and EMBASE. The total number of patients considered was 488. The most often used parameters of response to therapy were the reductions in the maximum standardized uptake value (SUVmax) or the peak standardized uptake lean mass (SULpeak). Patients whose SUVs were higher at the baseline (before CRT) were associated with a better response to therapy and a better overall survival. SUVs remaining high after neoadjuvant therapy correlated with a poor prognosis. Available data indicate that FDG PET/CT or PET/MRI can be useful for predicting and assessing response to CRT in patients with resectable or borderline PDAC.

scholarly journals Role of 18F-PET-CT to predict pathological response after neoadjuvant treatment of rectal cancer

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Riccardo Caruso ◽  
Emilio Vicente ◽  
Yolanda Quijano ◽  
Hipolito Duran ◽  
Isabel Fabra ◽  
...  
Keyword(s):  
Rectal Cancer ◽  
Fdg Pet ◽  
Locally Advanced ◽  
Neoadjuvant Treatment ◽  
Standardized Uptake Value ◽  
Tumour Regression Grade ◽  
Pet Ct ◽  
Significant Difference ◽  
18F Fdg ◽  
Fdg Pet Ct

Abstract Objectives Neoadjuvant chemoradiation (nCRT) is universally considered to be a valid treatment to achieve downstaging, to improve local disease control and to obtain better resectability in locally advanced rectal cancer (LARC). The aim of this study is to correlate the change in the tumour 18F-FDG PET-CT standardized uptake value (SUV) before and after nCRT, in order to obtain an early prediction of the pathologic response (pR) achieved in patients with LARC. Data description We performed a retrospective analysis of patients with LARC diagnosis who underwent curative resection. All patients underwent a baseline 18F-FDG PET-CT scan within the week prior to the initiation of the treatment (PET-CT SUV1) and a second scan (PET-CT SUV2) within 6 weeks of the completion of nCRT. We evaluated the prognostic value of 18F-FDG PET-CT in terms of disease-free survival (DFS) and overall survival (OS) in patients with LARC.A total of 133 patients with LARC were included in the study. Patients were divided in two groups according to the TRG (tumour regression grade): 107 (80%) as the responders group (TRG0-TRG1) and 26 (25%) as the no-responders group (TRG2-TRG3). We obtained a significant difference in Δ%SUV between the two different groups; responders versus no-responders (p < 0.012). The results of this analysis show that 18F-FDG PET-CT may be an indicator to evaluate the pR to nCRT in patients with LARC. The decrease in 18F-FDG PET-CT uptake in the primary tumour may offer important information in order for an early identification of those patients more likely to obtain a pCR to nCRT and to predict those who are unlikely to significantly regress.

scholarly journals Limitations and benefits of FDG‐PET/CT in NF1 patients with nerve sheath tumors: A cross‐sectional/longitudinal study

2021 ◽  
Author(s):  
Yoshihiro Nishida ◽  
Kunihiro Ikuta ◽  
Shinji Ito ◽  
Hiroshi Urakawa ◽  
Tomohisa Sakai ◽  
...  
Keyword(s):  
Longitudinal Study ◽  
Fdg Pet ◽  
Cross Sectional ◽  
Nerve Sheath Tumors ◽  
Nerve Sheath ◽  
Pet Ct ◽  
Fdg Pet Ct
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