MR safety considerations for patients undergoing prostate MRI.
Varaha S TammisettiPublished in: Abdominal radiology (New York) (2020)
Over the past decade, there has been a dramatic increase in the number of patients undergoing prostate MRI scans. Patients presenting for prostate MRI are an ageing population and may present with a variety of passive or active implants and devices. These implants and devices can be MR safe or MR conditional or MR unsafe. Patients with certain MR-conditional active implants and devices can safely obtain prostate MRI in a specified MR environment within specific MR imaging parameters. Prostate MRI and PET-MRI in patients with passive implants such as hip prostheses, fiducial markers for SBRT, brachytherapy seeds and prostatectomy bed clips have unique concerns for image optimization that can cause geometric distortion of the diffusion-weighted imaging (DWI) sequence. We discuss strategies to overcome these susceptibility artifacts. Prostate MRI in patients with MR conditional active implants such as cardiac implantable electronic devices (CIED) also require modification of imaging parameters and magnet strength. In this setting, a diagnostic quality prostate MRI can be performed at a lower magnet strength (1.5 T) along with modification of imaging parameters to ensure patient safety. Imaging strategies to minimize susceptibility artifact and decrease the specific absorption rate (SAR) in both settings are described. Knowledge of MR safety considerations and imaging strategies specific to prostate MRI and PET-MRI in patients with implants and devices is essential to ensure diagnostic-quality MR images and patient safety.
Keyphrases
- contrast enhanced
- diffusion weighted imaging
- diffusion weighted
- magnetic resonance imaging
- computed tomography
- prostate cancer
- magnetic resonance
- patient safety
- benign prostatic hyperplasia
- patients undergoing
- high resolution
- soft tissue
- deep learning
- healthcare
- positron emission tomography
- dual energy
- high dose
- squamous cell carcinoma
- heart failure
- atrial fibrillation
- newly diagnosed
- mass spectrometry
- chronic kidney disease
- end stage renal disease
- ejection fraction
- convolutional neural network
- fluorescence imaging
- locally advanced
- case report
- robot assisted
- structure activity relationship