How to read mri images of a hip skin#

Plan the axial slices on the coronal plane angle the position block perpendicular to the shaft of femur. Slices must be sufficient to cover the hip joints from ischial tuberosities up to the line of pubic symphysis. An appropriate angle must be given in the sagittal plane (bisecting the femoral head and acetabulam). Check the positioning block in the other two planes. Plan the coronal slices on the axial plane angle the position block to bisect the acetabulum and femoral head. T1 vibe 3d fat sat coronal 1 mm small FOV Securely tighten the flex coil using straps to prevent respiratory artefactsДЄ three plane localiser must be taken in the beginning to plan the sequences. Position the patient over the flex coil and strap the coil over the hip joint(affected side ) Now give slight internal rotation of the hip. Position the patient supine with head pointing towards the magnet (head first supine). Now inject 10 to 15cc of dilute magnevist (5 cc normal saline, 2 cc Omnipaque, 2 cc 1% lidocaine, and 0.1 cc magnevist) Now place the tip of the needle directly onto the marked spot then check under fluoroscopic guidance to confirm intraarticular needle placement. Generally A 22 G 3ВЅвЂќ needle is used for all MR arthrogram injections.

How to read mri images of a hip skin#

Injection: - Now clean the marked site using betadine then anesthetize the skin and subcutaneous tissues with 1% lidocaine. Across the junction of femoral head and neck choose a point slightly superior to the interaction of the two lines and mark the point using a marking pen. Under fluoroscopic guidanceВ draw a virtual line dividing the femoral head and neck in half then draw another line perpendicular the above line. Marking for injection:- It is important to avoid the iliopsoas tendon and femoral artery. Immobilise the leg using sand bags over the ankle joint Position the patent supine with internal rotation of the hip then partially flex the knees and place a pillow under the knee. Positioning for injection:- Positioning of hip is one of the most important parts of the arthrogram. Injections for mri hip arthrograms are normally done under x ray fluoroscopic guidance (some radiologists prefer to use ultrasound). A radiologist will inject contrast medium into the joint space for the evaluation of joint abnormalities. Slices must be sufficient to cover the hip joints from anterior superior iliac spine up to the lesser trochanter.ДЄn arthrogram is an interventional procedure for the assessment of joint capsule pathologies. An appropriate angle must be given in the sagittal plane (perpendicular to the femur). Plan the axial slices on the coronal plane angle the position block parallel to the RT and LT femoral head. An appropriate angle must be given in the sagittal plane (parallel to the femur). Plan the coronal slices on the axial plane angle the position block parallel to the RT and LT femoral head. Suggested protocols, parameters and planningДЄ three plane localiser must be taken in the beginning to localise and plan the sequences. Give a pillow under the head for extra comfort (do not give cushions under the legs )Д¬entre the laser beam localiser over hip joints (4 inches below iliac crest) Securely tighten the body coil using straps to prevent respiratory artefacts Position the patient over the spine coil and place the body coil over the pelvis(iliac crest down to mid thigh) Position the patient in supine position with head pointing towards the magnet (head first supine) Now give slight internal rotation of the hip Offer earplugs or headphones, possibly with music for extra comfort relative or staff )Д¬ontrast injection risk and benefits must be explained to the patient before the scan If possible provide a chaperone for claustrophobic patients (e.g. Pregnancy (risk vs benefit ratio to be assessed)ДЄ satisfactory written consent form must be taken from the patient before entering the scanner roomДЄsk the patient to remove all metal objects including keys, coins, wallet, cards with magnetic strips, jewellery, hearing aid and hairpins Intracranial aneurysm clips (unless made of titanium) cardiac pacemaker, insulin pump biostimulator, neurostimulator, cochlear implant, and hearing aids) > For the evaluation of focal chondropathyДЄny electrically, magnetically or mechanically activated implant (e.g. > For the evaluation of osteochondromatosis > For the evaluation of hip dysplasia in children > For the evaluation of cystic changes in the acetabulum For the evaluation of foreign bodies in the acetabular fossa