Image Distortions on a Plastic Interstitial Computed Tomography/Magnetic Resonance Brachytherapy Applicator at 3 Tesla Magnetic Resonance Imaging and Their Dosimetric Impact
| Autor: | Laura E. van Heerden, Arjan Bel, Kees Koedooder, Zdenko van Kesteren, Oliver J. Gurney-Champion, Antonetta C. Houweling, Coen R. N. Rasch, Bradley R. Pieters |
|---|---|
| Přispěvatelé: | CCA - Imaging and biomarkers, Radiotherapy, Graduate School, Radiology and Nuclear Medicine, CCA -Cancer Center Amsterdam |
| Rok vydání: | 2017 |
| Předmět: |
Organs at Risk
Cancer Research medicine.medical_treatment Brachytherapy Urinary Bladder Planning target volume Uterine Cervical Neoplasms Computed tomography Field strength 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Electromagnetic Fields medicine Humans Radiology Nuclear Medicine and imaging 3 Tesla Magnetic Resonance Imaging Radiation medicine.diagnostic_test business.industry Rectum Magnetic resonance imaging Radiotherapy Dosage Patient data Magnetic Resonance Imaging Oncology 030220 oncology & carcinogenesis Female Tomography Nuclear medicine business Tomography X-Ray Computed Plastics |
| Zdroj: | International journal of radiation oncology, biology, physics, 99(3), 710-718. Elsevier Inc. International Journal of Radiation Oncology-Biology-Physics, 99(3), 710-718. ELSEVIER SCIENCE INC |
| ISSN: | 1879-355X 0360-3016 |
| Popis: | Purpose: To quantify magnetic resonance imaging (MRI)distortions on a plastic intracavitary/interstitial applicator with plastic needles at a field strength of 3 T and to determine the dosimetric impact, using patient data.Methods and Materials: For 11 cervical cancer patients, our clinical MRI protocol was extended with 3 scans. From the first scan, a multi-echo acquisition, a map of the magnetic field (B-0) was calculated and used to quantify the field inhomogeneity. The expected displacements of the applicator were quantified for the clinical sequence using the measured field inhomogeneity and the clinical sequence's bandwidth. The second and third scan were our routine clinical sequence (duration |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|