At present, the country is actively and steadily promoting the reform of public hospitals. The government has invested more financial funds to help hospitals introduce advanced medical equipment . In particular, the introduction of large-scale equipment (CT, MRI, DSA, etc.) in tertiary hospitals is increasing every year. At the same time, the technology of large-scale equipment (CT, MRI, DSA, etc.) is also developing rapidly and rapidly, which leads to a large variety of large-scale equipment models, and the quality of the equipment is the same in the monitoring work. Within the margin of error, but in order to ensure that the newly purchased equipment can meet the performance indicators promised by the seller and the equipment in use is in good condition, we have the responsibility to compare and analyze the parameters of different types of equipment, and provide more to the hospital leadership. The knowledge helps to reduce the difficulty of the hospital demonstration model, so that they can select the most cost-effective equipment when purchasing. This paper compares and analyzes one model of Siemens, GE, Philips 128-row CT and Toshiba's 320-row CT parameters as follows: :
In addition to the differences in parameters of different brands of CT, there are:
Low dose control is different
Siemens dual-source CT does not scan a small amount of heart CT scan, the rack only needs to rotate 90 degrees to collect excellent quality heart images, through real-time cardiac gating, its adaptive ECG pulse dose control technology will change any heart rate With corresponding adjustments, the scanning dose is reduced by more than half compared to other Siemens CTs; when examining acute and obese patients, the total energy of the two X-rays reaches 160 kW, ensuring even at the fastest scanning and bed-in speeds. Good image quality, 1950px rack holes and 5000px scanning range, can also be a full-body scan in patients with high obesity.
GE Gems CT uses gemstones as detector materials, allowing the arena to instantly change the emission energy. It can scan small lesions that cannot be found by conventional CT. The radiation dose of cardiac examination is as low as 0.62mSV.
The Philips 128-row CT is a large-area detector that uses non-helical scanning for cardiac imaging to eliminate overlapping coverage of helical scans, reducing the radiation dose of the entire heart imaging by more than 80% to 2 with high quality images. -3msv, adult coronary scans at 1-2mSv, lungs as low as 0.34mSv, infant heart scans are below 1mSv.
Toshiba's 320-row CT dose-adjustment mode allows heart scans to use only regular doses in the default phase, while most other scans are only 20% conventional.
Different detector
Siemens dual-source CT integrates two X-ray sources and two detectors to acquire CT images in a rack. The system has a large rack aperture of 1950px and an imaging field of view, a scanning range of 5000px, and a time resolution of 83ms.
GE Gem CT introduces a new technology for spectral grating imaging. CT imaging is a five-dimensional space (x, y, z, time and energy) imaging with a spatial distribution rate of 0.23 mm3.
Philips uses a 200px ultra-wide NanoPanel 3D spherical detector design. By using nano-high integrated detector technology, the traditional CT detector assembly is highly integrated into one module. Each NanoPanel is equivalent to 256 traditional CT detector units. Each detector module on the detector's Z-axis is perpendicular to the arena source. This has the advantage that it can simultaneously filter the X-ray scattered line detectors of the XYZ axis, eliminating ray artifacts and improving image sharpness.
The Toshiba 320-row CT is a dynamic volume CT with a 0.5mm detector, which uses a dynamic volumetric scanning mode, and covers a range of 160mm in a circle, which can complete the "HD camera" of various organs throughout the body.
The above are the advantages of different brands of CT, but also expose their own shortcomings:
Siemens dual-source CT only uses a double-ball tube for heart scans, and uses a gymnasium for other organs. This kind of back-and-forth use of the arena is very detrimental to the arena, and the instability of the arena is greatly increased. The chances of damage to the arena increase and the maintenance costs increase greatly.
GE's Gem CT detector materials use gemstones, so the detectors of this material, although receiving energy, are more expensive.
Philips is recognized as the fastest scanning CT in the industry, but the detector is only 80mm wide and does not cover the entire heart or other organs.
Toshiba's 320-row CT is due to the larger coverage of the detector, and the consequent disadvantage of the cone angle, which causes the cross-section of the first 1-60 image and the latter 260-320 image to be invalid.
In short, the advantages and disadvantages of high-end CT of different brands are relative. The continuous development and progress of CT technology has brought about major changes in clinical imaging diagnosis.
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