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The Royal College of Radiologists has recommended chaperones of the appropriate gender for those undergoing intimate scans. This has significant implications for clinical and research programmes. Two hundred and fifty women undergoing scanning in a screening trial were sent postal questionnaires to determine their views as to the presence of chaperones and the gender of ultrasonographers. Ninety-five percent of 198 women stated that they would not like another person to be present during transvaginal scanning. Of greater consequence to women was the gender of the ultrasonographer, with 83.3% expressing a preference for a female ultrasonographer. This needs to be considered in making decisions about allocation of scarce resources.  相似文献   
964.
Neutron stimulated emission computed tomography (NSECT) is presented as a new technique for in vivo tomographic spectroscopic imaging. A full implementation of NSECT is intended to provide an elemental spectrum of the body or part of the body being interrogated at each voxel of a three-dimensional computed tomographic image. An external neutron beam illuminates the sample and some of these neutrons scatter inelastically, producing characteristic gamma emission from the scattering nuclei. These characteristic gamma rays are acquired by a gamma spectrometer and the emitting nucleus is identified by the emitted gamma energy. The neutron beam is scanned over the body in a geometry that allows for tomographic reconstruction. Tomographic images of each element in the spectrum can be reconstructed to represent the spatial distribution of elements within the sample. Here we offer proof of concept for the NSECT method, present the first single projection spectra acquired from multi-element phantoms, and discuss potential biomedical applications.  相似文献   
965.
We describe a new nasal stent for the treatment of bilateral congenital choanal atresia. The stent is made up of reinforced endotracheal tube mounted on a portex carrier tube. It potentially causes less internal crusting and stent blockage and is secured without sutures. It remains patent for at least 4 weeks. We have used the stent successfully in six patients between 1998 and 2004 at Leeds General Infirmary and present the data collected retrospectively. The current practice in the UK for treatment and stenting for congenital choanal atresia was investigated by a prospective internet based questionnaire sent to 18 consultant paediatric otolaryngologists of whom 12 (67%) responded. Their experience and results are reported. The literature has been reviewed.  相似文献   
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Interdigitating dendritic cell sarcomas (IDCSs) are extremely uncommon tumours that arise predominantly in lymphoid tissue. We report a case of an IDCS arising in the parotid gland of a 73-year-old man. Clinically, a primary salivary gland tumour was suspected but fine needle aspiration cytology suggested a soft tissue tumour. A diagnosis of IDCS was made on histopathological examination of the resection specimen, with subsequent confirmation by electron microscopy. Given the extreme rarity of this tumour at this site, it is unlikely to be a common diagnostic problem, but the importance of multiple diagnostic modalities is emphasized. The findings of cytology, histology, immunohistochemistry and electron microscopy have not previously been described together in a single case report of this tumour.  相似文献   
968.
Ocular scrofuloderma with orbital tuberculosis is a rarely described presentation of childhood tuberculosis. Bilateral involvement has not been reported earlier in the medical literature. Here is reported a 3-year-old boy who presented with bilateral infraorbital swellings of tubercular etiology. Computed tomography (CT) scan of the upper face revealed enhancing soft tissue lesions in both the lower lids of the eyes, with extraconal extension into the orbits and with erosion of the right zygomatic bone. Tubercular etiology was confirmed by the Ziehl Neelsen staining of the aspirate from the lesion, which was positive for acid-fast bacilli and growth ofMycobacterium tuberculosis in the aspirate culture. The patient showed marked improvement of his lesions on anti-tubercular treatment.  相似文献   
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