ARRS 2022 Abstracts


E1329. Added Value of SWI Beyond Hemorrhage and Calcification Detection
  1. Zachary Farina; SUNY Upstate Medical University
  2. Rajiv Mangla; SUNY Upstate Medical University
  3. Kavya Mirchia; SUNY Upstate Medical University
  4. Pratit Pokharel; SUNY Upstate Medical University
  5. Abdelmohsen Hussien; University of Texas Southwestern Medical Center
Susceptibility-weighted imaging (SWI) is an MRI sequence that relies on differences in magnetic susceptibility to generate contrast between different tissues and molecules. Susceptibility refers to the ability of a substance to distort an applied magnetic field. Therefore, SWI imaging can detect substances that distort a local magnetic field such as calcium and iron. The most common application of this imaging sequence is for detection of blood products and calcifications. However, this is a relatively new modality of imaging that has the potential to be useful for neuroradiologists in the detection of a variety of pathologies and diseases. In this exhibit, we will review unique imaging findings through a series of specific cases to demonstrate the usefulness of SWI in outside of hemorrhage and calcification detection.

Educational Goals / Teaching Points
After participating in this exhibit, learners will be more familiar with SWI as an imaging modality. They will also be equipped with knowledge of the sequence’s usefulness in detecting pathology beyond the simple hemorrhage and calcification detection.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
This exhibit will provide a brief overview of SWI as an imaging modality. Following this overview, we will review unique SWI findings for a variety of vascular pathologies penumbra, migrainous hemiplegia, capillary telangiectasia, and disseminated intravascular coagulation), neoplastic/mass-like lesions (brain abscess, sarcoidosis, tumor versus radiation necrosis, and fungal infection), neurodegenerative diseases (Parkinson's disease, Wilson's disease, amyotrophic lateral sclerosis, and amyloid angiopathy), demyelinating diseases (progressive multifocal leukoencephalopathy and multiple sclerosis), and traumatic pathologies (lollypop sign and retinal hemorrhage) through a case-based format.

SWI sequences are useful in detecting products that distort a magnetic field such as blood products and calcium. Traditionally, this imaging modality has been used to diagnose small hemorrhages and calcifications. However, we describe unique SWI findings that can be useful in the detection of a variety of vascular, neoplastic, neurodegenerative, demyelinating, and traumatic pathologies. It is important for radiologists and neuroradiologists to be aware of the diverse applications of this imaging modality.