In this paper, we extend a nonnegatively constrained iterative method and three stopping rules for its iterations to the medical imaging inverse problems of computed tomography (CT), positron emission tomography (PET), and single photon emission computed tomography (SPECT); the iterative method and stopping rules were introduced for use in astronomical imaging. The paper begins with a brief int...

In order to evaluate the usefulness of 18-fluorodeoxyglucose (FDG) positron emission tomography (PET) in the assessment of therapeutic effects, a study was performed before and after therapy in 126 patients with non-small cell lung cancer (NSCLC) codified stage I to stage IIIB. Treatment with an early curative result was given in 58 patients, whereas in 68 cases it was limited to palliation. Du...

Positron Emission Tomography/Computed Tomography (PET/CT) is a new generation modality which gives both functional and morphological information along with CT component performing anatomical imaging, in which positron emitting radioisotopes are used with the aim of functional imaging. PET/CT has been used in the staging and re-staging of lung cancer and also in the evaluation of solitary pulmon...

Recently, positron emission tomography (PET) imaging using PSMA-ligands has gained high attention as a promising new radiotracer in patients with prostate cancer (PC). Several studies promise accurate staging of primary prostate cancer and restaging after biochemical recurrence with (68)Ga-PSMA ligand Positron emission tomography/computed tomography (PET/CT). However, prospective trials and cli...

Increasingly, positron emission tomography (PET) scans are being utilized in radiation medicine departments for staging, treatment planning, and follow-up. Positron emission tomography scans use signals emitted from the radioactive tracer [F]-fluoro-2-deoxy-Dglucose (FDG-glucose) that is preferentially taken up by cancer cells. After image processing including fusion with simultaneously obtaine...

The lengthy and tortuous journey, the unstable positioning of the colon and rectum, and variations in intestinal wall thickness during intestinal peristalsis have brought about significant difficulties for computed tomography (CT) diagnosis. Glucose metabolism is unstable in the colon and rectum, and smooth muscle peristalsis, gland secretion, spasms, and inflammation can also cause abnormal me...

A: angiography; US: ultrasonography; EUS: endoscopic ultrasonography; IUS: intraoperative ultrasonography; EUS-FNA: endoscopic ultrasonography-guided fine-needle aspiration; MRI: magnetic resonance imaging; SRS: octreoscan; CT: computerized tomography; MDCT: multidetector computerized tomography; PET: positron emission tomography; PET-CT: PET with computerized tomography; ICC: immunocytochemist...

This Tutorial Account aims to be a useful educational resource which describes how automate fluorine-18 positron emission tomography (PET) radiochemistry using cassette-based automated radiosynthesis platforms.

objective(s): the aim of this study was to analyze detection rates and effectiveness of 18f-fluorodeoxyglucose positron emission tomography (fdg-pet) cancer screening program for prostate cancer in japan, which is defined as a cancer-screening program for subjects without known cancer. it contains fdg-pet aimed at detection of cancer at an early stage with or without additional screening tests ...

This article discusses attenuation correction strategies in positron emission tomography/computed tomography (PET/CT) and 4-dimensional PET/CT imaging. Average CT scan derived from averaging the high temporal resolution CT images is effective in improving the registration of the CT and the PET images and quantification of the PET data. It underscores list-mode data acquisition in 4-dimensional ...