Standard Uptake Value
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2021 ◽  
Vol 11 (18) ◽  
pp. 8301
Author(s):  
Young Chul Cho ◽  
Ki Baek Lee ◽  
Su Jung Ham ◽  
Jin Hwa Jung ◽  
Yubeen Park ◽  
...  

The objective of this study was to investigate the feasibility of a newly developed anticancer drug-releasing radiofrequency ablation (RFA) system in a porcine liver model. A 15-gauge drug-releasing cooled wet electrode (DRCWE) was newly developed to improve the RFA efficacy for creating a large ablation as well as for simultaneously delivering an anticancer drug to the tumor margin. Nine ablations in three pigs were performed by the DRCWE. The sectioned liver specimens were evaluated by measuring the ablation zone by a positron emission tomography/magnetic resonance imaging examination to investigate whether 18F-fluorodeoxyglucose was exactly diffused. Volumes of the ablation zones released drug injection volumes, circularity, retention rate defined as the ratio between an estimated and injection dose, and the standard uptake value were assessed. The drug-releasing RFA was technically successful without procedural-related complications. During the procedure, the color changes of the ablated zones of the liver were observed in all specimens. The mean drug injection volume was higher than the ablated volumes (17.21 ± 2.85 vs 15.22 ± 2.30 cm3) and the circularity was 0.72 ± 0.08. Moreover, the retention rate was 72.89% ± 4.22% and the mean standard uptake value was 0.44 ± 0.05. The drug-releasing RFA system was feasible not only for local ablation but also for the delivery of anticancer drugs. The results of this study indicate that this novel strategy of localized RFA with a drug delivery system could be a promising option for the prevention of local recurrence rates.


2021 ◽  
Vol 8 ◽  
Author(s):  
Yun Zhang ◽  
Yuxiao Hu ◽  
Shuang Zhao ◽  
Can Cui

Objectives: The main aim of this study was to evaluate the differences in metabolic parameters of positron emission tomography with 2-deoxy-2-[fluorine-18] fluoro-D-glucose integrated with computed tomography (18F-FDG PET/CT) measured based on fixed percentage threshold of maximum standard uptake value (SUVmax) and adaptive iterative algorithm (AT-AIA) in patients with cervical cancer. Metabolic parameters in stage III patients subdivided into five groups according to FIGO and T staging (IIIB-T3B, IIIC1-T2B, IIIC1-T3B, IIIC2-T2B, IIIC2-T3B) were compared.Methods: In total, 142 patients with squamous cell cervical cancer subjected to 18F-FDG-PET/CT before treatment were retrospectively reviewed. SUVmax, mean standard uptake value (SUVmean), maximum glucose homogenization (GNmax), mean glucose homogenization (GNmean), metabolic tumor volume (MTV), total lesion glycolysis (TLG), and glucose homogenization total lesion glycolysis (GNTLG) values measured based on the above two measurement methods of all 142 patients (IIB-IVB) and 102 patients in the above five groups were compared.Results: MTV measured based on fixed percentage threshold of SUVmax was lower than that based on AT-AIA (p < 0.05). MTV40%, MTV0.5, TLG0.5, GNTLG40%, and GNTLG0.5 values were significantly different among the five groups (p < 0.05) while the rest parameters were comparable (p > 0.05). All metabolic parameters of group IIIB-T3B were comparable to those of the other four groups. MTV40%, MTV0.5, GNTLG40%, and GNTLG0.5 in group IIIC1-T2B relative to IIIC1-T3B and those of group IIIC2-T2B relative to group IIIC2-T3B were significantly different. All metabolic parameters of group IIIC1-T2B relative to IIIC2-T2B and those of group IIIC1-T3B relative to group IIIC2-T3B were not significantly different.Conclusion: Metabolic parameters obtained with the two measurement methods showed a number of differences. Selection of appropriate methods for measurement of 18F-FDG-PET/CT metabolic parameters is important to facilitate advances in laboratory research and clinical applications. When stage III patients had the same T stage, their metabolic parameters of local tumor were not significantly different, regardless of the presence or absence of lymph node metastasis, location of metastatic lymph nodes in the pelvic cavity or para-abdominal aorta. These results support the utility of the revised FIGO system for stage III cervical cancer, although our T-staging of stage III disease is incomplete.


Acta Medica ◽  
2021 ◽  
pp. 1-9
Author(s):  
Osman Kupik ◽  
Sertaç Asa ◽  
Gülnihan Eren

Objective: A high metabolism/perfusion rate in the tumor is known to be factor indicating poor prognosis. The goal of this study was to investigate the prognostic value of the ratio of the conventional standard uptake value to early-phase imaging standard uptake value in patients with newly diagnosed non-small cell lung cancer. Materials and Methods: Early-phase imaging was obtained in the first 120 seconds and conventional imaging was taken after median 66 minutes. The ratio of the conventional standard uptake value to early-phase imaging standard uptake value was calculated. Univariate and multivariate analyses were performed using the Cox proportional hazards regression model to assess the relationship between progression-free survival and ratio of the conventional standard uptake value to early-phase imaging standard uptake. Results: A total of 77 patients with non-small cell lung cancer were recruited. Progression-free survival analysis was performed in 52 inoperable patients. Progression-free survival was found to be related to conventional standard uptake value (p<0.001), tumor size (p<0.001) and ratio of the conventional standard uptake value to early-phase imaging standard uptake in univariate analysis (p=0.047). In the multivariate analysis, ratio of the conventional standard uptake value to early-phase imaging standard uptake (p=0.001, HR=1.145, 95CI%:1.145-1.719) and tumor size (p<0.001, HR=1.026, 95CI%:1.007-1.045) were found to be independent poor prognostic factors. Conclusion: The ratio of the conventional standard uptake value to early-phase imaging standard uptake was found an indicator for prognosis. Evaluating the early phase imaging, without a need for kinetic program or software, without disrupting the routine functioning of the clinic, with conventional imaging may contribute to cancer patient management. There is a need for studies with larger groups of patients.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jiale Hou ◽  
Tingting Long ◽  
Zhiyou He ◽  
Ming Zhou ◽  
Nengan Yang ◽  
...  

Abstract Objective To evaluate the diagnostic efficacy of 18F-AlF-NOTA-octreotide (18F-OC) PET/CT compared with that of 68Ga-DOTATATE PET/CT. Materials and methods Twenty patients (mean age: 52.65 years, range: 24–70 years) with biopsy-proven neuroendocrine neoplasms (NENs) were enrolled in this prospective study. We compared the biodistribution profiles in normal organs based on the maximum standard uptake value (SUVmax) and mean standard uptake value (SUVmean), and uptake in NEN lesions by measuring the SUVmax on 18F-OC and 68Ga-DOTATATE PET/CT images. The tumor-to-liver ratio (TLR) and tumor-to-spleen ratio were calculated by dividing the SUVmax of different tumor lesions by the SUVmean of the liver and spleen, respectively. The Wilcoxon signed-rank test was used to compare nonparametric data. Data were expressed as the median (interquartile range). Results In most organs, there were no significant differences in the biodistribution of 68Ga-DOTATATE and 18F-OC. 18F-OC had significantly lower uptake in the salivary glands and liver than 68Ga-DOTATATE. 18F-OC detected more lesions than 68Ga-DOTATATE. The uptake of 18F-OC in the tumors was higher in most patients, but the difference was not statistically significant relative to that of 68Ga-DOTATATE. However, the TLRs of 18F-OC were higher in most patients, including for lesions in the liver (p = 0.02) and lymph nodes (p = 0.02). Conclusion Relative to 68Ga-DOTATATE, 18F-OC possesses favorable characteristics with similar image quality and satisfactory NEN lesion detection rates, especially in the liver due to its low background uptake. 18F-OC therefore offers a promising clinical alternative for 68Ga-DOTATATE.


2021 ◽  
Vol 11 ◽  
Author(s):  
Jie Liu ◽  
Leilei Wu ◽  
Zhiguo Liu ◽  
Samuel Seery ◽  
Jianing Li ◽  
...  

BackgroundThe aim of this study was to evaluate 18F-AlF-NOTA-PRGD2 positron emission tomography/computed tomography (18F-RGD PET/CT) and serum inflammation biomarkers for predicting outcomes of patients receiving combined antiangiogenic treatment for advanced non-small cell lung cancer (NSCLC).MethodsPatients with advanced NSCLC underwent 18F-RGD PET/CT examination and provided blood samples before treatments commenced. PET/CT parameters included maximum standard uptake value (SUVmax) and mean standard uptake value (SUVmean), peak standard uptake value (SUVpeak) and metabolic tumor volume (MTV) for all contoured lesions. Biomarkers for inflammation included pretreatment neutrophil-to-lymphocyte ratio (PreNLR), pretreatment platelet-to-lymphocyte ratio (PrePLR), and pretreatment lymphocyte-to-monocyte ratio (PreLMR). Receiver operating characteristic (ROC) curve analysis was used to describe response prediction accuracy. Logistic regression and Cox’s regression analysis was implemented to identify independent factors for short-term responses and progression-free survival (PFS).ResultsThis study included 23 patients. According to ROC curve analysis, there were significant correlations between the SUVmax, SUVmean, and 18F-RGD PET/CT MTV and short-term responses (p&lt;0.05). SUVmax was identified using logistic regression analysis as a significant predictor of treatment sensitivity (p=0.008). Cox’s multivariate regression analysis suggested that high SUVpeak (p=0.021) and high PreLMR (p=0.03) were independent PFS predictors. Combining SUVpeak and PreLMR may also increase the prognostic value for PFS, enabling us to identify a subgroup of patients with intermediate PFS.Conclusion18F-RGD uptake on PET/CT and serum inflammation biomarker pretreatment may predict outcomes for combined antiangiogenic treatments for advanced NSCLC patients. Higher 18F-RGD uptake and higher PreLMR also appear to predict improved short-term responses and PFS. Combining biomarkers may therefore provide a basis for risk stratification, although further research is required.


2021 ◽  
pp. 030089162110185
Author(s):  
Pietro Bertoglio ◽  
Luigi Ventura ◽  
Vittorio Aprile ◽  
Maria Angela Cattoni ◽  
Dania Nachira ◽  
...  

Objective: To evaluate the influence of lung adenocarcinoma second predominant pattern on the maximal standard uptake value (SUVmax) and its prognostic effect in different histologic groups. Methods: We retrospectively collected surgically resected pathologic stage I and II lung adenocarcinoma from nine European institutions. Only patients who underwent preoperative PET-CT and with available information regarding SUVmax of T (SUVmaxT) and N1 (SUVmaxN1) component were included. Results: We enrolled 344 patients with lung adenocarcinoma. SUVmaxT did not show any significant relation according to the second predominant pattern ( p = 0.139); this relationship remained nonsignificant in patients with similar predominant pattern. SUVmaxT influenced the disease-free survival in the whole cohort ( p = 0.002) and in low- and intermediate-grade predominant pattern groups ( p = 0.040 and p = 0.008, respectively). In the high-grade predominant pattern cohort and in the pathologic N1 cases, SUVmaxT lost its prognostic power. SUVmaxN1 did not show any significant correlation with predominant and second predominant patterns and did not have any prognostic impact on DFS. Conclusions: SUVmaxT is influenced only by the adenocarcinoma predominant pattern, but not by second predominant pattern. Concurrently, in high-grade predominant pattern and pN1 group the prognostic power of SUVmaxT becomes nonsignificant.


2021 ◽  
Author(s):  
Kairui Wang ◽  
Baozhen Wang ◽  
Qian Zhao ◽  
Li Guo ◽  
Yongfeng Liang ◽  
...  

Abstract Background: To study the application value of standard uptake value (SUVmax), a positron emission tomography/computed tomography (PET/CT) index in the diagnosis and evaluation of the prognosis of patients with gastric cancer who have not received any treatment. Methods: A retrospective analysis was made on the patients who were diagnosed to have gastric cancer at the General Hospital of Ningxia Medical University and received a PET/CT examination prior to treatment. According to different factors like sex, pathological stage, and survival time, the SUVmax in the results of 18F-labelled fluoro-2-deoxyglucose (18F-FDG) PET/CT examination was statistically compared and analysed. Results: A total of 110 newly diagnosed patients with gastric cancer were included in this study. Pathological results confirmed that there were 78 cases of gastric adenocarcinoma, 30 cases of primary gastric lymphoma and two cases of chronic atrophic gastritis. The difference between the primary gastric lymphoma group and gastric adenocarcinoma groups was statistically significant (t = 4.13, P < 0.05). In the postoperative pathological report of patients with gastric cancer, the SUVmax of stage I, stage II, stage III and stage IV were 2.89 ± 1.36, 14.09 ± 9.32, 7.36 ± 3.72, and 10.20 ± 1.91, respectively, the difference between each group was statistically significant (F = 16.10, P < 0.05).The univariate survival analysis showed that there was a significant difference in survival time between the low SUVmax and high SUVmax groups (X2 = 5.08, P < 0.05). Cox multivariate survival analysis showed that SUVmax was an independent factor affecting postoperative survival time of patients with gastric adenocarcinoma (P < 0.05). Compared with the low SUVmax group, patients in the high SUVmax group had a higher postoperative death risk than those in the low SUVmax group, hazard ration (HR) = 3.91 (95% confidence interval [CI]: 1.09-14.01). Conclusion: The index of SUVmax in PET/CT can provide a reliable semi-quantitative diagnostic value for pathological staging after gastric cancer surgery. Furthermore, SUVmax has an important reference value for the survival time of patients after gastric cancer surgery, which can better guide clinical treatment.


2021 ◽  
Author(s):  
Shao-Ting Wang

Abstract Background: Pulmonary lymphoma is rare while the radiographic lesions are nonspecific. The use of bronchoscopy, the first-line procedure, is controversial, and may be of limited diagnostic value for pulmonary lymphoma diagnosis. Methods: Cases of pulmonary lymphoma diagnosed by bronchoscopy were retrospectively reviewed from January 2010 till December 2020. Clinico-radiological records of these cases were retrieved and bronchoscopy was performed with histopathological evaluation of the biopsy specimens. Results: Of the 41 cases included in our study, 20 were primary pulmonary lymphoma. The majority of subtypes were diffuse large B-cell lymphoma(43.9%) and extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue lymphoma(29.3%), with high percentage of underlying chronic disease. The common Computed Tomography(CT) abnormalities were mass(43.9%), consolidation(24.4%) or ground-glass opacities(24.4%). To evaluate the pulmonary lesions distribution, 41.5% patients had segmental lesions, 29.3% presences of diffuse lesions, 17.1% of local lesions and 12.2% of hilar lesions, with the maximal value of standard uptake value (SUVmax) median value of 9.6. At bronchoscopy, 41.5% lesions were identified as focal solitary mass, 22% were normal, 17.1% were mucosae asperity or edema, 9.8% were diffuse airway submucosal nodules or thickening and 9.8% were bronchiole stenosis, while certain endobronchial patterns may correspond to specific imaging features. Conclusions: Pulmonary lymphoma sometimes creates significant diagnostic dilemma for the clinicians, while the imaging features and endobronchial patterns are characteristic. Bronchoscopy is still a useful tool, that is minimally invasive, to diagnose pulmonary lymphoma, while accurate analysis of the clinico-radiological records is essential before such procedure.


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