MRI-based prostate and dominant lesion segmentation using cascaded scoring convolutional neural network.

Purpose: Dose escalation to dominant intraprostatic lesions (DILs) is a novel treatment strategy to improve the treatment outcome of prostate radiation therapy. Treatment planning requires accurate and fast delineation of the prostate and DILs. In this study, a 3D cascaded scoring convolutional neural network is proposed to automatically segment the prostate and DILs from MRI.

Prostate and dominant intraprostatic lesion segmentation on PET/CT using cascaded regional-net.

Focal boost to dominant intraprostatic lesions (DILs) has recently been proposed for prostate radiation therapy. Accurate and fast delineation of the prostate and DILs is thus required during treatment planning. In this paper, we develop a learning-based method using positron emission tomography (PET)/computed tomography (CT) images to automatically segment the prostate and its DILs.

Salvage Radiotherapy Management Decisions in Postprostatectomy Patients with Recurrent Prostate Cancer Based on F-Fluciclovine PET/CT Guidance.

Imaging with novel PET radiotracers has significantly influenced radiotherapy decision making and radiation planning in patients with recurrent prostate cancer (PCa). The purpose of this analysis was to report the final results for management decision changes based on F-fluciclovine PET/CT findings and determine whether the decision change trend remained after completion of accrual. Patients with detectable prostate-specific antigen (PSA) after prostatectomy were randomized to undergo either conventional imaging (CI) only (arm A) or CI plus F-fluciclovine PET/CT (arm B) before radiotherapy.

82Rubidium chloride positron emission tomography discrimination of recurrent intracranial malignancy from radiation necrosis.

Background: Accurate identification and discrimination of post treatment changes from recurrent disease remains a challenge for patients with intracranial malignancies despite advances in molecular and magnetic resonance imaging. We have explored the ability of readily available Rubidium-82 chloride (RbCl) positron emission tomography (PET) to identify and distinguish progressive intracranial disease from radiation necrosis in patients previously treated with radiation therapy.

Methods: Six patients with a total of 9 lesions of either primary (N.

Uptake of 18F-Fluciclovine in Paget Disease.

Since its recent approval by the United States Food and Drug Administration, fluciclovine PET-CT has gained widespread use for imaging of recurrent prostate cancer patients. As an amino acid-based radiotracer transported by LAT-1 and ASCT-2 transporters, fluciclovine exploits the up-regulation of amino acid transporters in malignant cells. We present a rare case of fluciclovine uptake in Paget disease in a 58-year-old man with suspected recurrent prostate cancer and asymmetric increased left hemipelvic uptake on imaging.