Early detection of avascular necrosis of the femoral head following renal transplantation.

This prospective study included 43 patients undergoing renal transplantations. Magnetic resonance imaging (MRI) and X-rays of the hip joints were produced 3 and 12 months after transplantation. In 6 hip joints of 4 patients (9.

Intracranial stenoocclusive disease: MR angiography with magnetization transfer and variable flip angle.

Purpose: To assess time-of-flight MR angiography that uses magnetization transfer contrast (MTC) pulses, tilted optimized nonsaturating excitation (TONE), and a 256 x 512 image matrix for the detection of small intracranial arteries and for the detection and quantification of intracranial arterial stenoocclusive disease.

Methods: To assess anatomic sensitivity, six interpreters, in a blinded fashion, reviewed the MTC/TONE MR angiograms and selective intraarterial angiograms obtained in 70 patients within a mean interval of 5.5 days (SD, 1.

[Proton spin tomographic changes of the femoral shaft in patients with kidney transplantation].

In a prospective study 43 patients were reviewed 3 and 12 months after renal transplantation. The patients had MRI examinations and plain x-rays of the hips as well as punch biopsies of the iliac crest. In 9 patients diffuse, inhomogeneous bilateral changes of the MRI-signal patterns of the femoral diaphysis were seen.

[Clinical long-term results after corrective surgery of tetralogy of Fallot].

We studied 246 consecutive patients, mean age 11.9 +/- 6.7 years, with primary (n = 155) or secondary (n = 91) complete repair of tetralogy of Fallot (TOF) between 1961 and 1972.

[Functional imaging of the brain using low dose gadolinium-DTPA and Turbo-FLASH sequences].

A method for measuring regional blood volume and flow is described based on the reduced relaxation time following intravenous injection of Gd-DTPA. The optimal Gd dose and other parameters were first determined using turbo-flash sequences and a dilution phantom. A single maximum was found for a Gd-DTPA concentration of 4 mmol/l.