Accurate target volume delineation is crucial for the radiotherapy of tumors. Diffusion and perfusion magnetic resonance imaging (MRI) can provide functional information about brain tumors, and they are able to detect tumor volume and physiological changes beyond the lesions shown on conventional MRI. This review examines recent studies that utilized diffusion and perfusion MRI for tumor volume...

PURPOSE This pilot prospective study sought to determine whether dynamic contrast enhanced MRI (DCE-MRI) could be used as a clinical imaging biomarker of tissue toxicity from whole brain radiotherapy (WBRT). METHOD 14 patients who received WBRT were imaged using dynamic contrast enhanced DCE-MRI prior to and at 8-weeks, 16-weeks and 24-weeks after the initiation of WBRT. Twelve of the patient...

OBJECTIVE The effect of radiotherapy on moderate and severe Thyroid associated ophthalmopathy (TAO) was evaluated by various objective and quantitative indexes including T2 signal intensity ratios of orbital MRI inferior rectus and ipsilateral temporal muscle (T2SIR), extraocular muscles (EOM) volume, and the degree of exophthalmos using clinical research with prospective, randomized, double bl...

Short-course radiotherapy (5 x 5 Gy) followed by chemotherapy before total mesorectal excision (TME) decreased the probability of disease-related treatment failure and became new standard care in high-risk locally advanced rectal cancer (Bahadoer et al, Lancet Oncol. 2021). A-five-year follow-up RAPIDO trial recently confirmed reduction distant metastases, but revealed an increase locoregioal r...

Abstract BACKGROUND MRI, the standard of care (SOC) for meningioma radiotherapy planning, lacks sensitivity postoperative small volume disease and osseous or parenchymal invasion. BN003 (NCT03180268) randomizes patients with WHO-2 meningiomas MRI-determined GTR to observation 60 Gy IMRT resection bed. More sensitive specific imaging biomarkers may improve clinical outcomes in by limiting unnece...

Introduction: Glioma is the most common type of primary brain tumor that originates from glial tissues. These types of tumors have a high degree of malignancy and poor prognosis and low survival rates. The evaluation response to treatment is essential to decide whether present treatment is adequate or need for alternative therapy. The aim of this study was to evaluate the resp...

AIM To determine whether any changes in gross tumor volume occur between pre treatment MRI and week 5 MRI in high grade gliomas treated by conformal radiotherapy. METHODS AND MATERIALS Between July 2003-July 2005, 17 patients with WHO grades 3 and 4 malignant gliomas treated with conformal radiotherapy to a total dose of 60 Gy were included in this retrospective study. All patients had underg...

OBJECTIVE To compare potentials of magnetic resonance imaging (MRI), F-18 FDG, and 11C-Choline PET/CT in differentiating brain tumor recurrence from necrosis after radiotherapy. METHODS Fifty-five patients with suspected brain tumor recurrence or necrosis after radiotherapy underwent MRI, F-18 FDG, and 11C-choline PET/CT examinations, and all the patients were followed up for at least 11 mont...

OBJECTIVE To establish the interobserver reproducibility of tumour volumetry on individual multiparametric (mp) prostate MRI sequences, validate measurements with histology and determine whether functional to morphological volume ratios reflect Gleason score. METHODS 41 males with prostate cancer treated with prostatectomy (Cohort 1) or radical radiotherapy (Cohort 2), who had pre-treatment m...

MRI simulation is the process of acquiring high fidelity, high contrast resolution magnetic resonance images to identify true disease extent and proximity relative to adjacent organs at risk (OAR) for the purposes of radiation treatment planning. MRI simulation can be performed using dedicated MRI scanners in radiotherapy departments [1] or using MRI scanners sited in other departments as share...