Graduation thesis of medical imaging technology--discussion on the teaching of medical imaging physics in higher vocational colleges.
According to the characteristics of the course and the present situation of students, we should attach importance to the cultivation of teachers' quality, clarify the relationship between textbooks and students, and use rich teaching methods to change abstract discussion into intuitive teaching of integrating theory with practice, thus improving the teaching quality of medical imaging physics course.
Keywords: medical imaging physics teaching in higher vocational colleges
In recent ten years, the rapid development of large medical imaging equipment has greatly improved the level of diagnosis and treatment. With the urgent demand for medical imaging professionals, many undergraduate medical colleges in China have set up medical imaging majors. With the development of community medical care in China, more and more students apply for medical imaging major in higher vocational colleges. Taking Hubei Institute of Technology as an example, the number of students majoring in imaging has increased from one class to two or three classes every year. Whether colleges and universities focus on cultivating highly educated medical imaging clinical diagnosis professionals or highly educated medical imaging engineering technicians, the importance and necessity of setting up the course of Basic Medical Imaging Physics (hereinafter referred to as Imaging Physics) are emphasized in the curriculum. Some undergraduate colleges have also started to offer imaging physics as an elective course in clinical medicine, with the aim of making clinicians have the basic theoretical knowledge of medical imaging and providing the necessary theoretical basis for the subsequent professional courses-medical imaging diagnostics or medical imaging.
1. Current Situation of the Curriculum of Imaging Major in Higher Vocational Medical Colleges
Taking hubei polytechnic institute as an example, the imaging major in higher vocational medical colleges now recruits high school students of arts and sciences and secondary vocational students. In terms of curriculum, the first year of the university only offered science and engineering courses of medical electronics foundation, and the related advanced mathematics knowledge was lacking, so the students' mathematics foundation was relatively weak. The basis of medical imaging physics is an interdisciplinary subject and a very important professional basic course. The purpose of teaching is to enable students to master the basic physical principles and laws of medical imaging theory; Understand the physical theory knowledge of medical imaging; It lays a foundation for deeply understanding the imaging process, evaluating images, reading images and mining biological information contained in images. This requires some advanced mathematics, nuclear physics, quantum physics, ultrasonic physics and many other knowledge to pave the way. Of course, more basic knowledge of imaging technology is needed. Faced with these necessary knowledge, it is a fact that higher vocational students majoring in imaging can't finish learning in a limited time and limited hours. In fact, imaging physics is a new course born with the establishment of imaging specialty, which has existed in China for less than ten years. Therefore, from teaching materials to teaching, all schools are in the stage of groping forward. How to make higher vocational students learn this course effectively without foundation? I write out my teaching experience in the teaching process for several years and discuss it with you.
2. To improve the professional quality of teachers, we must establish professional concepts.
Due to the lack of relevant teachers, the teaching tasks of image physics in colleges and universities are mostly undertaken by teachers in the physics teaching and research section. However, the professional nature of physics and imaging physics is very different. The former is a basic science course, while the latter is a professional basic course. Teachers engaged in the teaching of imaging physics must have certain medical professional knowledge and high professional quality, and must establish professional ideas in teaching, organically combine physics knowledge with imaging knowledge, enhance students' interest in learning, and improve the teaching quality of this course. Therefore, teachers should strengthen their professional quality, use the opportunity of clinical training to learn imaging knowledge and practical technology, and try their best to do a good job in teaching.
3. We must properly grasp the depth of knowledge in the teaching process.
Imaging physics was established by the teaching staff of the pre-established Institute of Imaging, and gradually improved in the teaching process. It is an interdisciplinary subject that applies advanced mathematics knowledge, physics knowledge, imaging theory and computer technology to ultrasonic imaging technology, X-CT imaging technology, isotope imaging technology and magnetic vibration imaging technology. The starting point of knowledge is very high, and it is difficult for students to learn. In the process of teaching, we should properly grasp the depth of knowledge in the teaching materials, and make it simple and easy to understand. For example, the description of ultrasonic field involves more advanced mathematical knowledge. In the teaching process, we should pay attention to guiding students to understand the distribution nature of the field and the physical meaning of describing the quantity of the field, so as to avoid students from reducing their understanding and learning interest because of the lack of mathematical knowledge. In the part of magnetic vibration, students need to have some knowledge of nuclear physics and quantum mechanics in order to accurately understand the concepts and phenomena such as energy level and transition of nuclear spin. In teaching, we should pay attention to collecting some materials and try to explain them with popular, classic and macro hypotheses to enhance students' perceptual knowledge of the micro-world.
4. Pay attention to the weight relationship between the principles of imaging physics and related knowledge of imaging technology and imaging equipment.
X-CT imaging, ultrasound imaging, isotope imaging and magnetic resonance imaging each have two main contents: physics and the basic principles of imaging. In the teaching process, it is undoubtedly the easiest thing for teachers who graduated from physics to focus on explaining the basic principles of physics. However, students' interest in learning often focuses on the principle of imaging, and they are more interested in the knowledge involved in imaging technology and imaging equipment. Although imaging technology and imaging equipment will be explained in detail in the practical teaching of later professional courses, in order to receive good teaching results, we will briefly introduce this part here first. Over the years, all the students in our school have shown great interest in learning image physics. This has something to do with our teaching methods.
5. Pay attention to improving students' perceptual knowledge.
All parts of the knowledge of image physics are abstract, and students generally find it difficult to understand and learn. Therefore, improving students' perceptual knowledge through various means can help students get twice the result with half the effort. In the process of teaching, we will demonstrate the experiment of gyro precession to students and explain the knowledge about the spin and spin magnetic moment of nucleons in the nucleus. With the knowledge of sound wave propagation and reflection, the experiment of ultrasonic measurement is explained in detail. Assign certain class hours to lead students to visit and study in relevant departments of affiliated hospitals. The clinical diagnosis teachers and technical teachers of ultrasound and CT were invited to explain the principle, operation method and diagnosis of the instrument to students on the spot, so that students can have a perceptual understanding of what they have learned in class and deepen their understanding, and good results have been achieved.
6. Realize the multi-level and three-dimensional teaching materials.
Because this course belongs to applied knowledge, it is difficult to learn, so we have made a multi-level and three-dimensional attempt in teaching materials. Curriculum is the basis of teaching materials, and teaching materials are the carrier of curriculum. Modern educational technology should be integrated into teaching materials to achieve diversification, matching and coordination. Our approach is: text teaching materials are closely combined with modern multimedia means.
The textbook system includes: (1) the traditional paper textbook Medical Imaging Physics (published by People's Health Publishing House); (2) The original electronic lesson plans used by teachers, with a large number of self-made and clinical pictures and self-developed animations, ask questions for students to think about; (3) learning software to assist students in self-study and research, such as CAI courseware "CT and Magnetic Resonance Imaging Principles" (published by People's Health Electronic Audio-visual Publishing House, was included? Eleventh five-year plan? National key electronic publications); (4) Two courseware in the form of web pages. Multi-form, multi-purpose and multi-level teaching resources and a variety of structural supporting teaching publications aimed at teaching services have been initially formed.
In a word, image physics is a new course. Only by constantly exploring, summing up experience and gradually improving teaching methods and means can the teaching effect be enhanced. Through several years' efforts, on the one hand, students can see that what they have learned now is what they will use in the future, which improves their interest in learning basic courses, on the other hand, they cultivate their learning ability, and at the same time, they are interested in subsequent courses. Medical imaging diagnostics? This study laid the foundation.
References:
Hou, Ma Xinchao, et al. Reflections on the curriculum of physics in medical colleges [J]. University Physics, 2005,24, (5): 53-56.
Bao Shanglian, Don. Research progress of medical physics [J]. Progress of Natural Science, 2006, 16, (1): 7- 13.
[3] Tong Jiaming, Liu Chengyu, Zhou Xiaobin, etc. Investigation on the teaching status of physics theory courses for medical students in colleges and universities [J]. College Physics, 2005,24, (7): 55-59.
Hou Shulian. Principles of CT and magnetic resonance imaging [M/CD]. Beijing: People's Health Electronic Audio-visual Publishing House, 2007.
The second part of the graduation thesis of medical imaging technology major is "On image fusion to promote the development of medical imaging field"
Abstract: The progress of science and technology not only promotes the development of industry and commerce, but also promotes the development of medicine. Computer technology is widely used in imaging medicine. At present, all kinds of medical examination instruments are more and more sophisticated and their functions are more and more perfect. The storage and transmission of image information provides a better foundation for medical research and diagnosis. The fusion of medical images is the fusion of image information, and the diagnosis of diseases is aided by computer technology. Medical image fusion is a new development direction of medical imaging. This paper analyzes the fusion of medical images and discusses the influence and function of image fusion on the development of medical images.
Keywords: medical image fusion diagnosis
First, image fusion.
Medical image fusion is actually the fusion of image information by computer technology. It includes digitizing image information, and then obtaining new image information through data matching to better observe diseases, and using computers as an auxiliary means to make diagnosis more accurate and specific.
Development trend of image fusion
The trend of image fusion
Medical imaging is one of the rapidly developing clinical disciplines in recent years, in which ultrasound and radiology have long been applied to medical diagnosis. But in the face of various symptoms of different patients, a single imaging examination is not enough as a basis for diagnosis. Therefore, image fusion has increasingly become the focus of medical attention, and people hope that through the inspection, comparison and analysis of multiple images, the inspection results will be more accurate and better assist the treatment of clinical diseases. The development of influence fusion improves the comprehensive level of medical diagnosis and is of great significance to promote the development of imaging. Moreover, the fusion of medical images can not only add icing on the cake for diagnosis, but also help for treatment. For example, combined with X-ray, ultrasound, focusing, magnetic vibration and so on. It is imperative to influence the development of fusion, which will promote the renewal and development of medical images.
The Necessity of Image Fusion
1, the update and development of medical technology needs to affect the integration.
Computer technology is widely used in various fields, including medical imaging. With the development and implementation of new technology, image post-processing technology also needs continuous improvement, and image fusion technology is a new development of post-processing technology. The technology of front and back synchronization can give full play to the benefits of imaging.
2. Image fusion makes the detection more comprehensive and accurate.
There are many imaging examination methods, from B-ultrasound to X-ray to CT, each of which is targeted, but has certain limitations. Each examination has a single limitation, which can only accurately reflect the data value on the one hand, which is not conducive to the diagnosis of diseases. Image fusion makes up for this defect.
3. Clinical diagnosis needs image fusion.
All examination methods are for the final clinical treatment, and imaging diagnosis is also for clinical treatment. Influence fusion concentrates the advantages of multiple single examinations, presents clearer images, makes the diagnosis clearer and more accurate, and provides better treatment plans according to the diagnosis to assist clinical treatment.
Methods and technical applications affecting fusion
The first is the integration of information technology. No matter what kind of diagnosis technology, you will eventually get the information that this technology can diagnose. Image fusion must first realize information fusion, and the transformation of image data is the key to understanding. In image conversion, the format of image information detected by different detection devices is converted and adjusted, so that it can more truly present the state of the detected part and ensure the accuracy of diagnosis.
Second, the integration of digital technology. The establishment of image database is intuitive and easy to extract information.
There is also the application of computer technology, and the fusion of these technologies makes the inspection after image fusion more specific and detailed.
The methods of image fusion include: landmark matching method, curved surface method, space moment matching method and cross correlation method.
Fourth, the clinical value of medical image fusion
Modern medicine applies the research results of image information obtained by computer technology to the diagnosis of clinical medicine, analyzes and processes all the examination results with computer technology, fuses images and reproduces high-definition and high-quality images. Clinical value mainly includes the following aspects:
Help clinical diagnosis
After image fusion, the structure and surrounding tissues of the examination site are clearly presented. Through image diagnosis, doctors can better understand whether the tissue morphology of the examination site is pathological and the degree of pathological changes. The early pathological changes of many diseases are not obvious, and once they are not found, the best treatment opportunity may be missed. After image fusion, tissue differences can be marked by regional enlargement, which is convenient for observation and diagnosis, and can find lesions in time and reduce missed diagnosis.
It is helpful for surgical treatment.
In the process of image fusion, image reconstruction and three-dimensional stereo orientation technology are combined. The application of these techniques can clearly display the state and spatial state of the lesion site and its surrounding tissues. Doctors can make a surgical plan according to the fused images and provide real-time display during the operation, which also provides convenience for postoperative observation.
Contribute to medical research
Image fusion combines the advantages of various examinations and provides more comprehensive and clear image information and more obvious pathological features. This is very valuable image data in medical research, which provides a better foundation for future disease research.
Conclusion: The fusion of medical images is to form a new image through the fusion and processing of a series of computer technologies. Medical image fusion is an important update of the development of medical imaging technology, which comprehensively applies various technologies to medical examination and diagnosis, and promotes the further development of imaging.
refer to
[1] Wang Jingyun, Li Shaolin; New progress of medical image fusion technology [J]; Journal of the Fourth Military Medical University; 20 issues in 2004
[2] Li Xiying; Yellow; ; Image fusion technology and its application in medicine [a]; Mr. Daheng's 90th birthday and chinese optical society 2004 academic conference [c]; In 2004
[3] Wujiang; Research on medical image fusion algorithm [D]; Northwestern Polytechnical University; In 2006
[4] Zhang, Wei Chunrong, Zhang Fubei; Overview of medical image fusion technology [J]; Guangxi science department; 0 1 2002
[5] Zhao; Li Gang; Zhang; ; The present situation of image fusion technology [a]; Proceedings of the 6th National Academic Conference on Information Acquisition and Processing (3) [c]; the year of 2008
Kang Xiaodong. The latest application of computer in medical treatment. Beijing: Electronic Industry Press, 1999, 46-70.
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