Modulation transfer function evaluation of cone beam computed and microcomputed tomography by using slanted edge phantom

Modulation transfer function (MTF) is a well known and widely accepted method for evaluating the spatial resolution of a digital radiographic imaging system. In the present study our aim was to evaluate the MTF obtained from CBCT and micro-CT images. A cylinder shaped phantom designed for slanted-edge method was scanned by a CBCT device at a 100 µm isometric voxel size and by a micro-CT device at a 20 µm isometric voxel size, simultaneously. The MTF curves were calculated and the mean spatial resolutions at 10% MTF were 3.33 + 0.29 lp/mm in the case of CBCT images and 13.35 + 2.47 lp/mm in the case of micro-CT images. The values showed a strong positive correlation regarding the CBCT and the micro-CT spatial resolution values, respectively. Our results suggests that CBCT imaging devices with a voxel size of 100 µm or below might aid the validation of fine anatomical structures and allowing the opportunity for reliable micromorphometric examinations

Towards the second edition of the book “QSAR-mapping and SBGN-Mapping for Biological Samples (Lecture Course and Special Practicum)”

I am very glad to present to the readers of “Medical Imaging Process & Technology” journal the forthcoming second edition of our book “QSAR-mapping and SBGN-mapping for Biological Samples (Lecture Course and Special Practicum)”, which is actually an introduction to the novel microscopic imaging approaches for numerous biomedical applications. It is possible to imagine that imaging and morphology of biological structures is not a rigorous mapping of different “material points” and structures in the field of view (or ROI’s), because the living state of the sample is a complex of many spatiotemporal dynamic processes.

Study on Fat and Thin Analysis of Tongue Body Based on Two-Dimensional Ultrasonic Imaging

In the development of traditional Chinese medicine in China for five thousand years, the tongue clinic occupies a very important position. In Chinese medicine, it is an irreplaceable role in the diagnosis and treatment of Chinese medicine of important method. Tongue diagnosis as one of the most characteristic of Chinese medicine diagnosis has been from the previous subjective observation, relying on the experience to judge the era into the new era of tongue diagnosis objectification, quantification, and the introduction of computer digital image processing technology to more Accurate diagnosis. This article will mainly introduce the current in the Chinese and Western medicine on all aspects of the tongue diagnosis of the objective, micro, quantitative progress, the characteristics of tongue images and a variety of processing techniques, including tongue image automatic segmentation, and tongue fat and thin The Relationship and Modernization of Organ Pathology in Viscera. At the same time, a tongue-sized measurement method is introduced. Two-dimensional ultrasound imaging is used as a means of inspection to establish a set of ultrasonic tongue-sized measurement methods. The measured parameters include the two longitudinal planes of the tongue and the cross-section of the tongue. Out of the tongue size of the data, the overall analysis of the size of the tongue shape. This method combines some of the configuration line spacing, area, and circumference measurement functions to directly measure the data. Finally, through the accuracy test of the measurement method, it is proved that the measurement result of tongue two-dimensional ultrasound imaging is accurate. All the efforts of modernization are committed to the Chinese medicine tongue medicine to scientific can be quantified; Chinese medicine tongue diagnosis will also make a greater contribution to modern medicine.

DICOM Standard and Its Application in PACS System

PACS is an important link in the rapid development of information technology in contemporary hospitals. DICOM is the standard of PACS TCM medical image format and transmission medical image protocol. This paper describes the status of PACS system based on DICOM standard. In addition, the PACS system is described in detail according to its application classification and the characteristics and significance of DICOM standard are expounded. At the same time, it discusses the long-term prospect of DICOM in PACS.

Application of Photoelectric Detection Technology in Nondestructive Testing

Non-destructive testing, is the use of sound, light, magnetic and electrical characteristics, without prejudice to or does not affect the performance of the object being tested under the premise of the detection of the existence of defects or non-uniformity, and gives the general term for all technical means of the size, location, nature and quantity of the defect. As does not affect the performance of the object being tested, non-destructive testing technology in these years has been rapid development. Photoelectric detection technology is one of the main technologies of photoelectric information technology. It is based on modern optoelectronic devices such as laser infrared fiber. The optical radiation of the detected object is received by the photoelectric detector and converted into electrical signal, and then processed by the following, access to useful information technology. The combination of photoelectric detection technology and non-destructive testing technology can take the advantages of both, and it will be widely used. In this paper, the commonly used non-destructive testing technology based on photoelectric technology is summarized. Mainly discusses infrared detection technology, machine vision detection technology, x-ray detection technology and other non-destructive testing technology. Their principles and scope of application are discussed in detail, and examples of the application of each technology in real life.

The performance of multi-slice spiral CT in pulmonary laceration and its application value

Benzoxazine resin, a new type of phenolic resin, has many advantages such as strong molecular design, no small With the continuous development of social information and modernization, the deepening of medical technology in the social status and role is also more and more important. The digitization and visualization of medical science and technology provide great convenience for the reading and access of clinical information. At the same time, it also improves the efficiency and accuracy of information reading and access. In addition, as China's population continues to proliferate, various traffic accidents are appalling, and serious consequences such as chest trauma and head trauma are also common in hospital emergency cases. Patients with pulmonary laceration need CT timely diagnosis and repair of the pulmonary pleural rupture, if not timely and accurate judgments will seriously endanger the safety of patients. To explore the performance of multi-slice spiral CT in pulmonary laceration and its application value, aim to improve the accuracy of CT dynamic observation of disease changes, improve the medical diagnosis technology and reduce the mortality rate of patients. For patients with pulmonary laceration, the diagnosis of rapid and effective, review, you can avoid missed or misdiagnosed, rest assured. And multi-slice spiral CT in the early diagnosis, multi-slice spiral CT used in clinical examination or diagnosis, the effect of great reference value, it is worth promoting the use.

Imaging Manifestation and Treatment of Nephroblastoma

Neonoblastoma is also known as renal embryos, Wilms tumor, originated in the undifferentiated posterior renal embryo base, can form a variety of components of the kidney. It shows Kidney cell tumor accounts for more than 80% of children under 15 years of age with malignant genitourinary tumors, accounting for about 8% of children's solid tumors. Statistics of domestic 6 pediatric hospital 2133 cases of malignant solid tumors, there are 503 cases of nephroblastoma (24%), the diagnosis of age 1 to 5 years old accounted for 75%, the highest age is 1 to 3 years old, the average age is 3.1 year old. 90% of cases diagnosed when the age is less than 7 years old, rare in adults and newborns. Male and female gender and left and right side of the same, bilateral accounted for 1.4% to 10.3%, the average age of diagnosis is 15 months. Abdominal mass is the most common symptoms, about 75% of patients with abdominal mass or abdominal distension treatment. As the lumps at a later time do not affect the nutritional and health of children, and no other symptoms, so more because parents give their children bath or dressing was accidental discovery, and often not the parents attention and delay treatment. Late tumor increased, children by huge tumor oppression, may have shortness of breath, loss of appetite, weight loss, irritability phenomenon. Gross hematuria rare, but microscopic hematuria can be as high as 25%. 25% to 63% of patients may have high blood pressure performance. A very small number of nephroblastoma spontaneous ulceration, clinical manifestations similar to acute abdomen. This study aims to investigate the imaging findings of B-ultrasonography, CT and MRI in nephroblastoma. Methods: Eight patients were examined by this study, and the lesion size, edge, internal structure and enhancement were observed. The results of the examination have the same, but the degree of display and subtle structure is different. Through medical images can be on the examination of the disease can make a diagnosis, MR the most diagnostic value. Comprehensive data can significantly improve the diagnostic accuracy.