A 46-year-old man stabbed himself with a knife. While he was stable, frontal and lateral chest radiographs were obtained (Fig. 1). Following a cardiac arrest, emergency sternotomy and cardiopulmonary bypass were performed. The acute margins of the heart and diaphragm were lacerated. The knife passed 5 mm posteromedial to the inferior vena cava (Fig. 2). Recovery was uneventful. Figure 1: Fronta...

The management of pituitary adenomas entails a multidisciplinary approach that involves neurosurgeons, endocrinologists, and radiation oncologists. Traditionally, the treatment included medical management, surgery (transsphenoidal microsurgical resection and transcranial approaches), and conventional fractionated radiotherapy. Stereotactic radiosurgery, through the various competing radiosurgic...

Motion blur in images is usually modeled as the convolution of a point spread function (PSF) and the original image represented as pixel intensities. The knife-edge function can be used to model various types of motion-blurs, and hence it allows for the construction of a PSF and accurate estimation of the degradation function without knowledge of the specific degradation model. This paper addre...

Studies on the submicroscopic organization of the thalamus. An electron microscope study of the ultrastructure of the nerve cells and of the extraccllular elements in the region of the medial thalamic nuclei of the mouse, * The results of the investigations presented in this survey report, and the techniques for the production of the diamond knife, are described in detail in a publication now b...

Optical internal urethrotomy (OIU) is the most common procedure performed for short segment bulbar urethral stricture worldwide. This procedure most commonly performed using Sachse's cold knife. Various perioperative complications of internal urethrotomy have been described in literature including bleeding, urinary tract infection, extravasation of fluid, incontinence, impotence, and recurrence...

4. Two brothers sold n lambs at a price n dollars. They divide the money as follows: the elder brother took 10 dollars, the younger one took 10 dollars, the elder one took again 10 dollars and so on. At the end it turned out that the sum for the younger brother was less than 10. He took the remainder and the pen-knife of his brother. The brothers agreed that the division was correct. What is th...

The reflex response to stretch has been studied in the upper limb of 20 spastic patients. The amplitude of reflex EMG was found to be closely related to the velocity of stretch. Reflex EMG in biceps and triceps muscles was augmented by increasing the length of the muscle, although minimal inhibition of reflex EMG in biceps was obtained in two patients by extreme stretch. The clasp-knife sensati...

We present an interactive method of surface modelling using a cutting tool. Terrain modification is an important part of spatial decision support systems for various applications, including landscape modelling, civil engineering and flood management. We describe an algorithm and demonstrate several examples of use the method on different surface features. This approach is based on the ability t...

An inverse treatment planning system for Gamma Knife radiosurgery has been developed using nonlinear programming techniques. The system optimizes the shot sizes, locations, and weights for Gamma Knife treatments. In the patient's prescription, the user can specify both the maximum number of shots of radiation and a minimum isodose line that must surround the entire treatment volume. After satis...