2000 Vol. 24, No. 1
Display Method:
2000, 24(1): 1-3.
[PDF 140KB]
Abstract:
Differentiating benign tumor from malignancy,diagnosing the metastasis and recurrence of cancer and coronary artery disease (CAD),PET possesses high specificity and sensitivity,and the high accuracy. But the check methods being used aren't replaced by it.Because the cost of PET is too expensive.Is there no feasibility in using PET like that? The analyses for the cost-effectiveness of PET to expatiat on wich PET is economical and accurate. So it will substitute for the present check methods.
Differentiating benign tumor from malignancy,diagnosing the metastasis and recurrence of cancer and coronary artery disease (CAD),PET possesses high specificity and sensitivity,and the high accuracy. But the check methods being used aren't replaced by it.Because the cost of PET is too expensive.Is there no feasibility in using PET like that? The analyses for the cost-effectiveness of PET to expatiat on wich PET is economical and accurate. So it will substitute for the present check methods.
2000, 24(1): 4-7.
Abstract:
The injury of the presynaptic nigrostriatal dopaminergic projection is the important mechanism of Parkinson's disease(PD). 18F-DOPA PET provides a measure of the structure as well as the biochemical iategrity of the dopaminergic ueurous, which contribute to the early diagnosis, differentiation diagnosis, prognosis evaluation of PD.
The injury of the presynaptic nigrostriatal dopaminergic projection is the important mechanism of Parkinson's disease(PD). 18F-DOPA PET provides a measure of the structure as well as the biochemical iategrity of the dopaminergic ueurous, which contribute to the early diagnosis, differentiation diagnosis, prognosis evaluation of PD.
2000, 24(1): 7-10.
Abstract:
This study analyzed significanc of radionuclide technique in differentiating dilated cardiomyopathy (DCM) from ischemic cardiomyoparthy (CAD-CM). The patients with DCM usually show mild perfusion abnormalities and do not have perfusion defects. Perfusion imaging and metabolic imaging is concordant in most patients and reduced wall motion is typically diffuse in DCM.The majority of patients with CAD-CM have perfusion defects and distributed as segmental. The perfusion imaging and metabolic imaging of patients with CAD-CM generally show mismatch and the wall motion abnormality is segmental.
This study analyzed significanc of radionuclide technique in differentiating dilated cardiomyopathy (DCM) from ischemic cardiomyoparthy (CAD-CM). The patients with DCM usually show mild perfusion abnormalities and do not have perfusion defects. Perfusion imaging and metabolic imaging is concordant in most patients and reduced wall motion is typically diffuse in DCM.The majority of patients with CAD-CM have perfusion defects and distributed as segmental. The perfusion imaging and metabolic imaging of patients with CAD-CM generally show mismatch and the wall motion abnormality is segmental.
2000, 24(1): 11-14.
Abstract:
131I imaging is a specific method for demonstrating metastatic differentiated thyroid carcinoma. It was reported that its specificity and sensitivity were 96% and 80% respectively, but false positive results also existed: many tissues besides thyroid can accumulate 131I such as frontal sinus mucocele, thymus, lung carcinoma, breast, esophagus benign stricture, colon graft, gastric pull-up, renal cyst etc. Although its incidence is low,it often misleads the diagnosis and brings unnecessary radiation to the patients. So it is necessary to make sure the location, cause and possible differentiate way of false positive results. In order to get correct diagnosis results, it is suggested to use other imaging modality or 201Tl imaging together and detect serum h-Tg at the same time.
131I imaging is a specific method for demonstrating metastatic differentiated thyroid carcinoma. It was reported that its specificity and sensitivity were 96% and 80% respectively, but false positive results also existed: many tissues besides thyroid can accumulate 131I such as frontal sinus mucocele, thymus, lung carcinoma, breast, esophagus benign stricture, colon graft, gastric pull-up, renal cyst etc. Although its incidence is low,it often misleads the diagnosis and brings unnecessary radiation to the patients. So it is necessary to make sure the location, cause and possible differentiate way of false positive results. In order to get correct diagnosis results, it is suggested to use other imaging modality or 201Tl imaging together and detect serum h-Tg at the same time.
2000, 24(1): 14-16.
Abstract:
The nature of solitary pulmonary nodules(SPN) are commonly identified by chest radiographs and computerized tomography(CT) which can't find out accurately the malignancy in general. Biopsies are often performed to evaluate the nodules further.However it can induce complication or death. As a safe and non-invasive method, characterized by high sensitivity, high specificity and high accuracy in differentiations between benign and malignant SPN, PET can decrease greatly the number of unnecessary diagnostic thoracotomy and related operation cost. So it would be used widely in the future.
The nature of solitary pulmonary nodules(SPN) are commonly identified by chest radiographs and computerized tomography(CT) which can't find out accurately the malignancy in general. Biopsies are often performed to evaluate the nodules further.However it can induce complication or death. As a safe and non-invasive method, characterized by high sensitivity, high specificity and high accuracy in differentiations between benign and malignant SPN, PET can decrease greatly the number of unnecessary diagnostic thoracotomy and related operation cost. So it would be used widely in the future.
2000, 24(1): 17-19.
Abstract:
Radionuclide renal imaging and plasma clearance methods can quickly quantitate renal blood flow and function in renal transplants. They can diagnose acute tubular necrosis and rejection, renal scar,surgical complications such as urine leaks, obstruction and renal artery stenosis after renal transplants. At the same time they can assess the therapy effect of renal transplant complications and can also predict renal transplant survival from early post-operative function studies.
Radionuclide renal imaging and plasma clearance methods can quickly quantitate renal blood flow and function in renal transplants. They can diagnose acute tubular necrosis and rejection, renal scar,surgical complications such as urine leaks, obstruction and renal artery stenosis after renal transplants. At the same time they can assess the therapy effect of renal transplant complications and can also predict renal transplant survival from early post-operative function studies.
Curent Situation of the Study Work of Radiation Dose Received by Patient in Interventional Radiology
2000, 24(1): 24-27.
Abstract:
Interventional radiology is a new technique in medical diagnosis and therapy. Based on the new computer technique and bioengineering material, it has been gotten much progress. Though the patients can get a lot of benefits from this technique, Scientists have noticed that the latency radiation risk of the patients. In some interventional radiological procedures, skln or lens injuries of the patients may be induced in non-optimized interventional radiology. Therefor, the scientists of radiation protection put their attention on the problem of the patient protection in the world.
Interventional radiology is a new technique in medical diagnosis and therapy. Based on the new computer technique and bioengineering material, it has been gotten much progress. Though the patients can get a lot of benefits from this technique, Scientists have noticed that the latency radiation risk of the patients. In some interventional radiological procedures, skln or lens injuries of the patients may be induced in non-optimized interventional radiology. Therefor, the scientists of radiation protection put their attention on the problem of the patient protection in the world.
2000, 24(1): 28-31.
Abstract:
Microdosimetry is a effective method to description of the spatial distribution of energy deposition, and play an important role in research of the neutron radiation protection and treatment. Microdosimetry can provide more detail and accurate information of spatial distribution and energy deposition in tissue for Boron Neutron Capture Therapy (BNCT) or neutron radiation protection. Some progression in experimental microdosimetry for neutron radiatin protection and treatment based on Tissue-equivalent proportional counters (TEPC).
Microdosimetry is a effective method to description of the spatial distribution of energy deposition, and play an important role in research of the neutron radiation protection and treatment. Microdosimetry can provide more detail and accurate information of spatial distribution and energy deposition in tissue for Boron Neutron Capture Therapy (BNCT) or neutron radiation protection. Some progression in experimental microdosimetry for neutron radiatin protection and treatment based on Tissue-equivalent proportional counters (TEPC).
2000, 24(1): 31-35.
Abstract:
mRNA differential display, based upon the techmiques of anchored primer-polymerase chain reaction and reverse transcription-pohymerase chain reaction,is an effective method for the detection of differentially expressed genes. Since its initial description, it has been an important molecular biology technique with continuous improvements and developments. The application of this technique for the identification of radiation injuries and repair related genes will help to understand the molecular mechanisms of these pathological processes,as well as provide guidance for prevention and therapy of radiation injuries.
mRNA differential display, based upon the techmiques of anchored primer-polymerase chain reaction and reverse transcription-pohymerase chain reaction,is an effective method for the detection of differentially expressed genes. Since its initial description, it has been an important molecular biology technique with continuous improvements and developments. The application of this technique for the identification of radiation injuries and repair related genes will help to understand the molecular mechanisms of these pathological processes,as well as provide guidance for prevention and therapy of radiation injuries.
2000, 24(1): 35-38.
Abstract:
Mammography is the most reliable method to lesions in the breast.This technique can detect small lesions before clear clinical symptoms appear.It requires high quality standards,since the contrast between normal and pathological areas in the breast is extremely low.To meet this required of high-quality studies at low dose,high attention to quality control is required on the parts of radiologist,radiographer and medical physicist.This Paper Presents the quality control tests,Those are the minimum set of tests,which should be carried out on an annual basis to help assure proper mammo graphic system performance.
Mammography is the most reliable method to lesions in the breast.This technique can detect small lesions before clear clinical symptoms appear.It requires high quality standards,since the contrast between normal and pathological areas in the breast is extremely low.To meet this required of high-quality studies at low dose,high attention to quality control is required on the parts of radiologist,radiographer and medical physicist.This Paper Presents the quality control tests,Those are the minimum set of tests,which should be carried out on an annual basis to help assure proper mammo graphic system performance.
2000, 24(1): 38-43.
Abstract:
Although the radiodiagnosis equipment is advanced, the actual output magbe changed when it has worked for some time. This may affect the quality of x-ray or lead to cases of unnecessary radiation exposure to workers and patients. In order to ensure the proper output, the quality assurance program should be organized. In this paper, the purpose, procedures, acceptable variations of the quality control for general X-ray equipment are listed and they will be useful to clinic practice.
Although the radiodiagnosis equipment is advanced, the actual output magbe changed when it has worked for some time. This may affect the quality of x-ray or lead to cases of unnecessary radiation exposure to workers and patients. In order to ensure the proper output, the quality assurance program should be organized. In this paper, the purpose, procedures, acceptable variations of the quality control for general X-ray equipment are listed and they will be useful to clinic practice.
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