Radiation protection

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Algorithms could cut CT costs & exposure

A German-US R&D collaboration is to commercialize a CT image reconstruction system that will yield enhanced image quality but with a lower radiation dose when compared with standard CT systems. Although initial applications are being lined up in industrial materials testing, talks are already under way with medical imaging vendors keen to exploit the technology in a clinical setting.

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Radiation Treatment Planning

Radiotherapy treatment planning relies on transversal CT images. They form a basis for treatment planning, dose calculation and increasingly the plan localization for external radiation therapy, called CT simulation. A dedicated CT scanner for radiotherapy plan simulation is one of the most essential pieces of equipment in a modern radiotherapy department. In contrast to external beam…

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High Resolution Protocol Optimization

Since the introduction of multi-slice computerized tomography (MS-CT), several authors have reported an increased exposure to radiation when using the manufacturer-specific protocols compared with the previous technique of single-slice computerized tomography (SS-CT). On the basis of comprehensive dose measurements conducted on a phantom, a study by S. M. Giacomuzzi et al reported that the mean…

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Procedure and Clinical Value of CT Fluoroscopy

The past several years, interventions using ultrasound for real-time image monitoring in diagnostic and therapeutic procedures have increasingly been integrated into the daily clinical routine. Limitations due to image-distorting physical effects, such as the total reflection at the soft tissue/lung boundary, are associated with the use of ultrasound. CT fluoroscopy on the other hand enables…

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Multi-slice CT: Learning from experience

The Netherlands - September '00 - A good example of one of the discussions was the general issue of dose reduction. All participants agreed that it would be a challenge to be able to realise this, although this should definitely not interfere with the image quality. An interesting challenge for the users as well as the manufacturers! Many interesting topics were presented during the seminar, of…

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The Perfect Partnership

The Ultimax with image intensifier & CCD camera technology is already well established as a premium multipurpose digital imaging end interventional system. The addition of DynaDirect FPD technology with its exceptional high-resolution performance simply makes the Ultimax the most advanced high performance multipurpose digital imaging system available. The combination of the Ultimax and…

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The Perfect Partnership

The Ultimax with image intensifier and CCD camera technology is already well established as a premium multipurpose digital imaging and interventional system. The additional DynaDirect FPD technology with its exceptional high-resolution performance simply makes the Ultimax the most advanced high performance multipurpose digital imaging system available. The combination of the Ultimax and…

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Advancing Pediatric Imaging with 16-Slice CT

Pediatric imaging presents many unique and difficult challenges to the radiologist. Correct and rapid diagnosis is extremely important in pediatric imaging and to that end we constantly strive for tests that offer more information, accuracy and versatility. However, it is also our duty to provide tests that are safe and minimise exposure to ionizing radiation. In recent months there has been…

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Methods and Results of Radiation Exposure Reduction Using Multislice CT

The number of CT examinations undertaken over the past few years has increased remarkably worldwide due to the new diagnostic possibilities afforded by multislice computer tomography (MSCT). As the new technology is gaining ground, many researchers and radiologists are looking for ways to reduce patient radiation exposure. In 2001, Giacomuzzi et al.1 of Innsbruck reported an up to 2.6-fold…

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Optimization and Reduction of CT Radiation Exposure

The exposure of patients to radiation by computed tomography has been widely discussed in recent years, both by professionals and by the public. The essential reason for optimizing patient exposure is the basic desire to keep radiation dose at the lowest possible level. This requires above all organ-specific and patient-specific adjustment of the radiation exposure in order to achieve uniform…

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Robust CT Protocols for Pediatric Cardiovascular Examinations

Pediatric cardiovascular disorders are extremely complex in nature and present with a widely variable array of abnormal anatomy. Imaging these disorders presents a unique set of challenges for the cardiovascular team. Complex anatomical variations require detailed volumetric image interpretation with high spatial and temporal resolution. In addition, the patients are invariably young. They may…

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