MRI sequence parameters Andrew Murphy and Dr Matt Skalski et al. In the standard STIR sequence, the spin echo sequence is completed by a previous 180° inversion pulse.

Cerebrospinal fluid in the brain ventricles and spinal canal, free fluid in the abdomen, fluid in the gall bladder and common bile duct, synovial fluid in joints, fluid in the urinary tract and urinary bladder, oedema or any other pathological fluid collection in the body). By judicious choice of TI, selective nulling of fat (STIR sequence, TI=180), white matter (TI=400), gray matter (TI=650) or CSF (T2-FLAIR, TI=2500) is possible. Fat has a short T1. STIR sequences. STIR does not specifically suppress fat; it only suppresses tissues with T1 values in the range of fat (200-300 ms). STIR image – Spondylodiscitis. The easiest way to identify STIR images is to look for fat and fluid filled space in the body (e.g. Spin magnetization can be modulated by using special RF pulses. Listed in the table below are the most common acquisition parameters for commonly used MRI pulse sequences (in msec). Hover on/off image to show/hide findings. Hence by choosing a short TI of 140 milliseconds, the fat signal can be suppressed . with STIR, FAT SAT sequences, water selective (PROSET WATS - water only selection, also FATS - fat only selection possible) excitation techniques, or pulse sequences based on the Dixon method. Specialised MRI images can be produced in order to answer specific clinical questions ; Specialised MRI images are frequently used in specific clinical settings to highlight structures or pathological processes. MRI interpretation Specialised MRI sequences. Advanced Discussion (show/hide)» No supplementary material yet.

Fat suppression is the process of utilizing specific MRI parameters to remove the deleterious effects of fat from the resulting images, e.g. Likewise, suppression proteinaceous materials and other short T1 tissues may occur. Key points.

Thus gadolinium-containing tissues with similar relaxation times will also be suppressed. Here are some common examples.

The combination of short TI inversion-recovery and fast spin echo sequences reduces acquisition time to acceptable limits for clinical practice.