SWISWI (Susceptibility-Weighted Imaging)

SWI is a new type of contrast in MRI which exploits the susceptibility differences between tissues. As a result SWI detects substances with different susceptibilities than their neighboring tissues such as deoxygenated blood, products of blood decomposition and microscopic iron deposits much better than conventional MR techniques. Among other things, the method allows for highly sensitive proof of cerebral hemorrhage and high resolution display of venous cerebral vessels.

Clinical Applications

  • Improved detection of hemorrhage, microbleeding (diffuse axonal injury), hemorrhagic transformation (stroke)
  • Detection of occult vascular disease (cavernomas, angiomas, telangiectasias)
  • Diagnosis of cerebral venous thrombosis, intra-arterial clot detection
  • Identification of iron and other mineral deposition
  • Helpful in MR diagnosis of neurodegenerative diseases (Alzheimer’s, multiple sclerosis, etc.)
  • Tumor characterization

Features & Benefits


SWI is compatible with iPAT (integrated Parallel Acquisition Technique) and takes only a couple of minutes, like conventional imaging sequences, but with improved sensitivity to blood, hemorrhage, mineralization deposits etc.


Additional Information

SWI combines magnitude and phase information from a high-resolution, fully velocity compensated 3D FLASH sequence. Phase images are unwrapped and high-pass filtered to highlight phase changes associated with venous vessels and converted into a mask that is multiplied with the corresponding phase image.

General Requirements

  • Biograph mMR
  • MAGNETOM Espree
  • MAGNETOM Prisma
  • MAGNETOM Skyra
  • MAGNETOM Spectra
  • MAGNETOM Symphony, A Tim System
  • MAGNETOM Trio, A Tim System
  • MAGNETOM Verio
  • MAGNETOM Prismafit
  • MAGNETOM Skyrafit
  • MAGNETOM Avantofit
  • MAGNETOM Amira
  • MAGNETOM Sempra
  • MAGNETOM Avanto
  • MAGNETOM Lumina
  • MAGNETOM Solafit
  • MAGNETOM Vidafit
  • MAGNETOM Altea

syngo MR A30
syngo MR B13
syngo MR C11
syngo MR D11

Please Note: Additional technical pre-requisites may apply. Upon receiving your request, your local Siemens representative will clarify whether your system meets the requirements.