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Midcareer job transitions are occurring for many reasons other than individual radiologists' professional performance quality, affability, and desire for geographic change. New causes seem to be related to the present health care environment. All radiologists should be aware of this disruptive change to the profession and of the resources available to help job seekers find new positions.

This article addresses imaging of intramedullary processes of the spinal cord. MRI, as the procedure of choice for the intramedullary space, is the primary imaging modality that is focused on. Patterns of signal abnormality, enhancement, and morphology are described that can be used to separate neoplasms, inflammation, infarction, vascular anomalies, degenerative processes, and congenital anomalies as they affect the spinal cord. Recognition of these patterns is essential for prompt and appropriate medical and surgical treatment.

This article emphasizes the utility of contrast-enhanced MRI in the detection of intradural extramedullary causes of myelopathy. Recognition of morphological patterns, signal intensities, and enhancement patterns frequently permits a specific diagnosis or a limited differential diagnosis.

The applicability of a fast spin-echo (PSE) technique for magnetic resonance imaging of the tem-poromandibular joint (TMJ) was studied, and the technique compared with a conventional spin-echo (CSE) technique. Sagittal Tl-weighted CSE and dual-echo FSE images of 50 TMJs in 25 patients with symptoms of internal TMJ derangement were compared. CSE and FSE images were diagnostically comparable in 22 TMJs (44%). The FSE technique was rated better than CSE imaging for delineation of the disk in 26 joints (52%), whereas the CSE technique was rated better in only two joints (4%). The FSE technique was preferred overall in 54% of the joints. Mild to moderate joint effusion was detected in 17 joints because additional T2-weighted data were provided with the dual-echo FSE technique. The study showed that FSE imaging is an effective technique for evaluation of the TMJ. It is faster and diagnostically comparable to or better than CSE imaging, with the added advantage of providing T2-weighted data.

A multi-channel sound simulation system for processing a stereophonic signal having a high frequency component for use with at least a pair of primary loudspeakers and a pair of secondary loudspeakers includes a receiving member for receiving the stereophonic signal and for producing a first primary channel signal and a second primary channel signal. The first and second primary channel signals are adapted to be respectively applied to a first primary loudspeaker and a second primary loudspeaker. The receiving member is further adapted to divide the input signal into a first secondary channel signal and a second secondary channel signal. The first and second secondary channel signals are fed through a roll-off member which inhibits the high frequency component of the signal, thereby producing inhibited first and second secondary channel signals. These inhibited signals are adapted to be respectively applied to the first and second secondary loudspeakers to supply ambiance information to a listener in a home audio/video system. The listener thus receives a fuller, more realistic sound in his/her own home.

Magnetic resonance (MR) imaging plays an important role in evaluation of ocular and orbital lesions. Ocular tumors can be distinguished and delineated from adjacent fluid collections. Demonstration of internal septa within a well-defined mass leads to the diagnosis of cavernous hemangioma, whereas vascularity and internal lobulations are the hallmark of capillary hemangiomas. MR is the procedure of choice for evaluation of the optic nerve sheath complex. It precisely delineates and characterizes optic neuritis, optic gliomas, and perioptic meningiomas.