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Lymphomatous involvement of gastrointestinal tract: Evaluation by positron emission tomography with ^(18)F-fluorodeoxyglucose

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World Journal of Gastroenterology 2005年第46期11卷 7284-7289页

作者： Sith Phongkitkarun vithya varavithya Toshiki Kazama Silvana C Faria Martha V Mar Donald A Podoloff Homer A Macapinlac Departments of Diagnostic Radiology and Nuclear MedicineBox 057 The University of Texas MDAnderson Cancer Center1515 Holcombe Blvd.HoustonTXUnited States

AIM： To demonstrate the ^18F-fluorodeoxyglucose positron emission tomography （18F-FDG PET） findings in patients with non-Hodgkin＇s lymphoma （NHL） involving the gastrointestinal （GI） tract and the clinical utility of modality despite of the known normal uptake of FDG in the GI tract. METHODS： Thirty-three patients with biopsy-proven gastrointestinal NHL who had undergone FDG-PET scan were induded. All the patients were injected with 10-15 mCJ FDG and scanned approximately 60 min later with a CTI/ Siemens HR （＋） PET scanner. PET scans were reviewed and the maximum standard uptake value （SUVmax） of the lesions was measured before and after the treatment, if data were available and compared with histologic diagnoses. RESULTS： Twenty-five patients had a high-grade lymphoma and eight had a low-grade lymphoma. The stomach was the most common site of the involvement （20 patients）. In high-grade lymphoma, PET showed focal nodular or diffuse hypermetabolic activity. The average SUVmax＋SD was 11.58±5.83. After the therapy, the patients whose biopsies showed no evidence of lymphoma had a lower uptake without focal lesions. The SUVmax＋SD decreased from 11.58±5.83 to 2.21± 0.78. in patients whose post-treatment biopsies showed lymphoma, the SUVmax＋SD was 9.42±6.27. Low-grade follicular lymphomas of the colon and stomach showed diffuse hypermetabolic activity in the bowel wall （SUVmax= 8.2 and 10.3, respectively）. The SUVmax was 2.02-3.8 （mean 3.02） in the stomach lesions of patients with MALT lymphoma. CONCLUSION： ^18F-FDG PET contributes to the diagnosis of high-grade gastrointestinal non-Hodgldn＇s lymphoma, even when there is the normal background FDG activity. Furthermore, the SUV plays a role in evaluating treatment response. Low-grade NHL demonstrates FDG uptake but at a lesser intensity than seen in high-grade NHL.

关键词： Positron emission tomography Non-Hodgkin's lymphoma Gastrointestinal neoplasm

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Impact of fifth order dispersion on soliton solution for higher order NLS equation with variable coefficients

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Journal of Ocean Engineering and Science 2020年第3期5卷 205-213页

作者： Angelin vithya M.S.Mani Rajan Department of Physics Anna UniversityUniversity College of EngineeringRamanathapuram 623513India

In this paper,the variable coefficient nonlinear Schrödinger equation with fifth order dispersion in the inhomogeneous optical fiber is investigated to study the impact of fifth order dispersion on attosecond soliton *** on the Darboux transformation method,soliton solution is constructed with modulated coefficients though Lax *** show that the coefficients of GVD and fifth order term are the main keys to control the amplitude,width and phase shift in the *** the suitable choices of coefficients for the obtained soliton solution,some new types of soliton management through fifth order are presented for the first ***,the influence of fifth order dispersion of the higher order NLS equations with and without modulated coefficients is discussed in *** will also highlight the impact of the studies on application in ocean *** results may be potentially useful in the soliton shaping and management in inhomogeneous fibers.

关键词： Fifth order dispersion Attosecond pulse Soliton control Soliton management Inhomogeneous fiber Oceanic waves

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