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The three-dimensional organization of the internal compartments of conventionally fixed and embedded rat-liver mitochondria has been determined by tomographic reconstruction from tilt-series images collected on the Albany high-voltage electron microscope. The results indicate that the inner membranes of these organelles are predominantly tubular in the(More)
A new type of specimen stage that permits more than 180 degrees of tilting about the axis of a side-entry rod has been developed for a high-voltage electron microscope (HVEM). Roughly cylindrical specimens, with radial dimensions of less than a few micrometers, that can be mounted on the tip of a microneedle or micropipette are applicable. For glass(More)
OBJECTIVE Tumors of the hypothalamic-pineal region may present with a wide variety of symptoms, including disturbed eating. We present a case where such a tumor was misdiagnosed as anorexia nervosa. METHOD We describe a case of pineal germinoma invading the hypothalamus, which was initially diagnosed as anorexia nervosa. RESULTS Clinical features(More)
The high-voltage electron microscope is used to study thick samples (0.25 to several micrometers) to obtain three-dimensional information at ultrastructural resolution. Three-dimensional image reconstructions are often employed to extract, process and display this information. The sets of images used to form reconstructions must be recorded for precisely(More)
The size and shape of a delamination in a multi-layered structure can be estimated in various ways from an ultrasonic pulse/echo image. For example the -6dB contours of measured response provide one simple estimate of the boundary. More sophisticated approaches can be imagined where one adjusts the proposed boundary to bring measured and predicted UT images(More)
Terahertz radiation (a.k.a. T-ray) has emerged as a powerful inspection technique in recent years. It extends into the lower region of far-infrared in the electromagnetic spectrum, and has been proven very effective in many NDE applications. T-ray is particularly useful in some areas where accessibility is difficult or even not possible for other(More)