Doctor profile
DR is the abbreviation of Digital Radiography, which consists of electronic cassette, scanning controller, system controller and image monitor. It directly converts X-ray photons into digital images through electronic cassette, which is a generalized direct digital X-ray photography. In a narrow sense, direct digital photography, that is, DDR(DirectDigit Radiography), usually refers to digital photography by using the image direct conversion technology of flat panel detector, which is a real direct digital X-ray photography system.
The similarity between DR and CR is that X-ray image information is converted into digital image information, and its exposure latitude has some advantages over ordinary intensifying screen-film system: the dynamic range of CR and DR is wide, and the exposure latitude is large, which allows technical errors in photography, even in some parts where exposure conditions are difficult to grasp; CR and DR can perform various image post-processing according to clinical needs, such as various image filtering, window width and window level adjustment, zoom roaming, image mosaic and distance, area and density measurement, etc., which provide technical support for detailed observation, before and after comparison and quantitative analysis in image diagnosis.
Introduction of General Innova2000 Flat Digital Subtraction X-ray Machine
Innova2000 adopts the first cardiac digital flat panel and amorphous silicon detector in human industry, providing all-digital image chain. By converting x-rays into digital signals at the acquisition point. Digital detectors capture information with minimum loss during the whole process of typical exposure. It can also eliminate artifacts and distortions produced by traditional image chains. Innova2000 is compatible with any DICOM (Unified Information Standard for Medical Images) and seamlessly connects with any DICOM network pictures.
In addition, the dynamic range of Innova2000 is 10 times larger than that of traditional equipment, enabling cardiologists to see blood vessels, guide wires, catheters and stents that are difficult to see. In addition, its digital technology enables cardiologists to see unusually clear blood vessels. Cardiologists can use Innova2000 to observe and treat coronary artery occlusion more conveniently during interventional therapy.
Since June 5438+ 10, 2002, Innova has performed nearly 65438+400,000 diagnostic interventional operations in cardiac catheterization laboratories all over the world. Dr MarieClaudeMorice, a cardiologist from French cardiologist JacquesCartier and founder of the Cardiovascular Society of South Paris, said: "GE's Innova2000 has accelerated the surgical procedures and significantly reduced the required exposure dose, so that we can see the details better. Therefore, better images can be produced and patients can get better care. "
Chen Zhi, president of GE Medical System in China, said, "Innova2000 uses GE's latest technology to crystallize digital detectors, and no film or image intensifier is needed. It will bring revolutionary technological changes to X-rays in the next 3-5 years and will enhance the confidence of cardiologists in diagnosis and interventional therapy. "
Motion board system
Exercise treadmill system is the main way to do ECG stress test. Electrocardiogram stress test refers to increasing the load of the heart through exercise or other methods (such as drugs), so as to increase the oxygen consumption of the myocardium. When the load reaches a certain amount, the myocardial blood supply of patients with coronary artery stenosis cannot be increased accordingly, thus inducing myocardial ischemia, which is displayed by ECG examination results, thus assisting the diagnosis of coronary heart disease and myocardial ischemia.
Plate exercise is a kind of graded exercise, the amount of exercise increases step by step from small to large, and the exercise time of each stage varies according to different schemes until the end of the exercise.
The change of ECG in treadmill exercise test is mainly the change of st segment, and its detection rate is related to the selected lead. Commonly used clues are:
(1) Complete data can be obtained by routine twelve leads, and the detection rate of myocardial ischemia is high.
(2) The 5-lead monitoring method only uses several leads, such as standard electrode, avf and V3-V6, and mainly detects inferior and anterior myocardial ischemia.
Indications of exercise tablet:
(1) as an auxiliary diagnostic examination method for the diagnosis of coronary heart disease.
(2) For patients who have been diagnosed with coronary heart disease, the severity and prognosis of the disease can be evaluated, and high-risk patients can be screened out for interventional therapy.
(3) Treadmill exercise test before discharge can diagnose the prognosis of patients with myocardial infarction.
(4) Treadmill exercise test can be used as an objective index to judge the efficacy of various treatments for coronary heart disease.
(5) It can be used as an evaluation standard of cardiac function, and it can also be used as a basis for objectively arranging the labor force of patients with heart disease and the physical therapy exercise plan of patients with heart disease.
In addition, the flat motion detection system has been widely used in medical institutions at home and abroad because of its manual control of the motion process and load and good repeatability. The maximum oxygen consumption of exercise treadmill test is high, which is easy to reach the predicted maximum heart rate. In addition, simultaneous monitoring of cardiopulmonary function in treadmill exercise test can objectively reflect cardiopulmonary reserve capacity.
Because of the diversity and complexity of ECG information changes, it is impossible for a simple surface ECG to reflect the pathophysiological changes of various parts of myocardium completely and accurately. It is necessary to further study the correlation between exercise test and coronary heart disease.
ABBOTTAXSYMPlus automatic chemiluminescence immunoassay analyzer
ABBOTTAXSYMPlus automatic chemiluminescence immunoassay analyzer is the concentrated embodiment of the latest and most advanced clinical immunoassay technology at home and abroad. The equipment adopts four patented detection principles and a number of patented technologies created by Abbott. According to the different substances to be detected, different analysis technologies, analysis steps and analysis processes are flexibly selected to achieve the best detection effect, the highest detection accuracy and the fastest detection speed. It is a new generation of labeled immune technology after radioimmunoassay, enzyme immunoassay and general chemiluminescence technology. The detection sensitivity is high, which can reach pg level. The detection speed is fast, and it takes only 10 minute from the computer to the first result, which greatly saves the time for patients to wait for the result; Wide detection range, up to 6 orders of magnitude; The reagents of all its projects have passed FDA certification, and the results are accurate and reliable. The backward methods such as RIA (nuclear medicine/isotope) are incomparable to chemiluminescence immunity in speed, accuracy, sensitivity, detection range and specificity.