Navigation Links
Quantitative PET imaging finds early determination of effectiveness of cancer treatment
Date:10/23/2007

RESTON, Va.With positron emission tomography (PET) imaging, seeing is believing: Evaluating a patients response to chemotherapy for non-Hodgkin lymphoma (NHL) typically involves visual interpretation of scans of cancer tumors. Researchers have found that measuring a quantitative indexone that reflects the reduction of metabolic activity after chemotherapy first beginsadds accurate information about patients responses to first-line chemotherapy, according to a study in the October issue of the Journal of Nuclear Medicine.

In our study, we demonstrated that a quantitative assessment of therapeutic response for patients with diffuse large B-cell lymphoma (DLBCL) is more accurate than visual analysis alone when using the radiotracer FDG (fluorodeoxyglucose) with PET scans, said Michel Meignan, professor of nuclear medicine at Henri Mondor Hospital in Creteil, France. The ability to predict tumor response early in the course of treatment is very valuable clinically, allowing intensification of treatment in those patients who are unlikely to response to first-line chemotherapy, he added. Similarly, treatment could possibly be shortened in those patients who show a favorable response after one or two cycles of chemotherapy, and quantification also may help identify the diseases transformation from low-grade to aggressive stage, he explained. However, visual interpretation of PET scans will always be the first step of analysis and will prevail in case of difficulties to quantify images, added Meignan.

Diffuse large B-cell lymphoma is a fast-growing, aggressive form of non-Hodgkin lymphoma, a cancer of the bodys lymphatic system. Although there are more than 20 types of NHL, DLBCL is the most common type, making up about 30 percent of all lymphomas. In the United States, about 63,190 people are expected to be diagnosed with non-Hodgkin lymphoma in 2007, according to recent statistics.

Ninety-two patients with DLBCL were studied before and after two cycles of chemotherapy, and tumor response was assessed visually and by various quantitative parameters, explained the co-author of Early 18F-FDG PET for Prediction of Prognosis in Patients With Diffuse Large B-Cell Lymphoma: SUV-Based Assessment Versus Visual Analysis. Meignan said, We found that quantification of tumor FDG uptake (the ratio of tissue radioactivity concentration) can markedly improve the accuracy of FDG PET for prediction of patient outcome. Additional studies need to be done, said Meignan, reiterating that the future monitoring of cancer tumor response will probably include a combination of quantitative analysis and visual assessment.

PET is a powerful molecular imaging procedure that uses very small amounts of radioactive materials that are targeted to specific organs, bones or tissues. When PET is used to image cancer, a radiopharmaceutical (such as FDG, which includes both a sugar and a radionuclide) is injected into a patient. Cancer cells metabolize sugar at higher rates than normal cells, and the radiopharmaceutical is drawn in higher amounts to cancerous areas. PET scans show where FDG is by tracking the gamma rays given off by the radionuclide tagging the drug and producing three-dimensional images of their distribution within the body. PET scanning provides information about the bodys chemistry, metabolic activity and body function.


'/>"/>

Contact: Maryann Verrillo
mverrillo@snm.org
703-652-6773
Society of Nuclear Medicine
Source:Eurekalert

Related biology news :

1. Imaging Lymph Nodes with Nanoparticles
2. New imaging method gives early indication if brain cancer therapy is effective, U-M study shows
3. Special Imaging Study Shows Failing Hearts Are Energy Starved
4. Duke engineers develop new 3-D cardiac imaging probe
5. Confocal imaging promises early detection of skin cancer
6. Newer imaging techniques may lead to over-treatment
7. Researchers use 3-D imaging system to unveil swimming behavior of microscopic plankton
8. Microscopic brain imaging in the palm of your hand
9. New imaging technology shown to detect pancreatic inflammation in type 1 diabetes
10. Purdues gold nanorods brighten future for medical imaging
11. PET imaging reveals the immune system at work
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/28/2017)... -- The report "Video Surveillance Market by ... Devices), Software (Video Analytics, VMS), and Service (VSaaS, Installation ... 2022", published by MarketsandMarkets, the market was valued at ... reach USD 75.64 Billion by 2022, at a CAGR ... considered for the study is 2016 and the forecast ...
(Date:3/23/2017)... Research and Markets has announced the addition of the "Global ... 2025" report to their offering. ... The Global Vehicle Anti-Theft System Market is ... next decade to reach approximately $14.21 billion by 2025. ... all the given segments on global as well as regional levels ...
(Date:3/20/2017)... 20, 2017 PMD Healthcare announces the release ... Wellness Management System (WMS), a remote, real-time lung health ... PMD Healthcare is a Medical Device, Digital Health, and ... to creating innovative solutions that empower people to improve ... focus, PMD developed the first ever personal spirometer, Spiro ...
Breaking Biology News(10 mins):
(Date:4/26/2017)... ... April 26, 2017 , ... WonderWorks, Myrtle ... to showcase the future of deep space exploration and inspire space enthusiasts. The ... spacecraft and includes a guest appearance by former Shuttle Astronaut Don Thomas. , ...
(Date:4/26/2017)... Hong Kong (PRWEB) , ... April 26, 2017 ... ... be hosted in EMEA and North America this May ... from May 16-18 , Donald H. Taylor, Chairman of the Learning and Performance ...
(Date:4/25/2017)... ... 2017 , ... Franz Inc ., an early innovator ... market leader for Semantic Graph Database technology, today announced Allegro ... effective system for developing and deploying applications to solve the challenges developers face ...
(Date:4/25/2017)... ... April 25, 2017 , ... ... Metrology Partners.     , Covalent’s Analytical Services unit provides high-quality data to ... measured within 24 hours of receipt. There are no price premiums, and customers ...
Breaking Biology Technology: