[en] The paper briefly introduces the production preparation, material requirement, and fabrication of key parts, welding, inspection and drawing-inserting test process during the trial manufacture of the full scale mock-up of spent fuel storage cells, which provides experience for the manufacture and localization of spent fuel storage cells. (authors)

[en] Local severe radiation ulcers usually lead to injuries of muscles, nerves, bones and secondary infections which result in progressive necrosis. We have used palliative debridement and myo-cutanerous flaps, axial flaps and greater omentum to treat 85 cases of severe radiation ulcers. All of the flaps and greater omenta survived completely with a primary healing rate of 92.9%. Our clinical practice showed that the surgical treatment of severe radiation ulcers could not only shorten the course of treatment but also reduce complications

[en] The clinical observation of a case of extremely severe local radiation injury by extremely heterogeneous external irradiation of ¹⁹²Ir is reported. The clinical pathologic change was systematically observed, and the temperature changes in the radiation injured parts were examined by infra-red thermo-imaging. Numbness and convulsion occurred 2 h after irradiation, the earliest erythema and swelling were found 4 h after irradiation. Blistering took place 54 h after irradiation, necrosis and severe pain occurred at the 5th day, the latest erythema and swelling were found 41 days after irradiation, and severe pain occurred at the 5th day, the latest erythema and swelling were found 41 days after irradiation, and blistering and erosive surface of wound took place at the 47th day. Infra-red thermo-imaging examination showed that temperature increased in the early stage of injury, while it decreased in blisters, necrotic regions and in the later stage of injury. The earlier the temperature increased, the severer the injury was. The region of temperature change was consistent with injury extent. Incipient reaction occurred early, injury was exacerbated by radiation sickness and local injury, symptoms were different in early and late stages and varied in severity, the disability was high and pain was severe. The temperature change during infra-red thermo-imaging can be used as one of the objective indices for the diagnosis of injury extent and degree

[en] Objective: To study further the diagnosis and treatment method of severe local radiation injury. Methods: To record and analyse the development of the clinic symptom and the therapeutic process of a case with many parts local radiation injury by external γ-irradiation of ¹⁹²Ir. Systematic treatment, local treatment and new modalities of treatment were applied. Results: The damaged parts of the case include both hands and both thighs and left chest wall. The patient has been cured by above-mentioned treatments. Conclusion: 1) In this case, there are some characteristics: multiple parts of the body are involved with nonuniform radiation. 2)The treatment scheme includes systematic treatment and local treatment. The authors have operated twice to repair the wound. During the first operation, stamp skin grafting and allograft skin were used to repair the wound on lift chest wall and both hands. Thanks to ionization radiation the immunological rejection has been weakened. The survival time of homograft skin has been prolonged. 3)Infra-red image should be used in estimating the scope and degree of radiation injury. 4)The functional recovery is dependent on the damaged site and severity

[en] In this paper, the characteristics, clinical manifestations, diagnostic criteria and treatment principles of acute and chronic radiation skin injury caused by external irradiation were analyzed based on domestic and foreign literatures, newly formulated national occupational health standards and the author's clinical experience, etc., which provide basis for timely treatment and standardized diagnosis and treatment of radiation skin injury. Acute radioactive skin injury is divided into I, II, III and IV degrees according to the size and clinical manifestations of the irradiated dose. The clinical course of these four degrees of acute radioactive skin injury not only showed the association between dosage and injury, but also showed the obvious phases of severe radiation injury. Early dose estimation through skin injury degree is helpful for rapid and accurate diagnosis, early prediction of lesion severity and decision of treatment strategy. Chronic radioactive skin injury is caused by long-term exposure to low-dose radiation due to occupational reasons;Another reason is prolonged formation of acute radioactive skin injury, which divided into I, II and III degree. It is only classified according to the degree of skin injury and has no strict dose-effect relationship with the radiation received. The treatment of acute and chronic radioactive skin injury is different according to the degree of injury. Local conservative treatment and surgical treatment using repair methods all consider the promotion effect of systemic treatment on wound healing. (authors)

[en] Objective: ¹⁸F-FDG PET/CT is now widely used in clinical staging of lung cancer. But false positive(FP) and negative (FN) results may occur. The aim of this study was to analyze the factors causing false ¹⁸F-FDG PET/CT results in the detection of lymph node in non-small cell lung cancer (NSCLC). Methods: Forty-eight patients underwent pulmonary lobectomy and dissection of lymph nodes after their ¹⁸F-FDG PET/CT and contrast enhanced CT results were retrospectively reviewed. The pathological status of the resected lymph nodes was the major concern. Results: The pathological examination confirmed metastasis in 51 out of 313 excised lymph nodes in 48 patients. There were 7 FN and 8 FP lymph nodes in PET/CT. The positive and negative predictive values of PET/CT were 85% and 97%, respectively, compared with 57% and 94% of CT(P=0.002, 0.045; respectively). Among the seven FN lymph nodes, 3 were with smaller tumor foci, 2 were 0.4 mm in short axis, and 2 proximate to the primaries were masked by the higher uptake of the primary tumor. The 8 FP lymph nodes were all with pulmonary complications and lymphadenitis. Conclusion: The smaller size, micro-metastases, and little separation from the primaries were the major reasons for FN, and the lymphadenitis with pulmonary complications for FP lymph node imaging in PET/CT. (authors)

[en] National occupational health standard-Diagnostic Criteria for External Radiation Bone Injuries has been approved and issued by the Ministry of Health. Based on the extensive research of literature, systematic study of the relevant laws and regulations, this standard was enacted according to its making principles. It is mainly used for diagnosis of bone injury induced by radiation accident, and it also can serve as a guide to diagnose bone injury induced by medical radiation. To implement this standard, and to diagnose and treat the external radiation bone injuries patient correctly and promptly, the contents of this standard were interpreted in this article. (authors)

[en] National occupational health standards--Diagnostic Criteria for Skin Cancer Induced by Radiation has been approved and issued by the Ministry of Health. Based on the extensive research of literature, systematic study of the relevant laws and regulations, this standard was enacted according to its making principles. This standard is mainly used for diagnosis of skin cancer induced by radiation accident and medical radiation. To implement this standard,and to diagnose and treat external radiation skin cancer patient correctly and promptly, the contents of this standard were interpreted in this article. (authors)

[en] Air plasma spray technique was used to prepare Fe-Ni-B coating on 1Cr18Ni9Ti stain steel substrate and the Fe-Ni-B coating was re-melted. The microstructure of Fe-Ni-B coating and interface configuration before remelting was analyzed using SEM and EDX apparatus. The micro hardness, thermal shocking performance, adhesion strength between coating and substrate was also studied. The results indicated that after the remelting, the coating microstructure became more compact, and diffusion and new ingredients appeared between the interfaces of coating and substrate, so the thermal shocking performance was improved. The adhesion strength between Fe-Ni-B coating and 1Cr18Ni9Ti stain steel substrate is 36.3 MPa and micro hardness distributes at 470-570 HV_0.2. The micro hardness of substrate near the coating is higher than that of the farside because of the thermal influence of spraying particles, however, the micro hardness of interface is relative low. (authors)

[en] Objective: To summarize our experience in the treatment of 12 cases of severe lumbodorsal radio-therapy ulcers. Methods: Of the 12 cases, 4 were male and 8 female. The youngest patient was 29 and the oldest was 67 years old. Their injuries were mainly resulted from radiotherapy for costal metastasis of breast cancer, carcinoma of uterus and dorsal skin carcinoma or scar induced by ⁶⁰Co γ-rays, deep X-rays or superficial accelerator electrons. Their local accumulative dose was 60-120 Gy. Palliative debridement was performed with partial excision of the ribs and spinous process. And then the defects were repaired with local skin flap in 2 cases, parascapular skin flap in 1 case and island musculocutaneous flap of latissimus dorsi muscle in 9 cases. Results: All the skin flaps and musculocutaneous flaps grafted on the wounds of the 12 cases survived (100%). Grade A healing was achieved in 11 cases of ulcer (91.7%) and grade B healing in 1 cases (8.3%). All the skin flaps and musculocutaneous flaps grafted survived and the ulcers never recurred. Conclusion: Severe lumbodorsal radiotherapy injury often results in complications. The authors performed palliative excision and repaired by transferring an axial skin flap or a musculocutaneous flap with good blood circulation selected in accordance with the principles of plastic surgery, which can effectively improve blood circulation and promote wound healing. Reverse musculocutaneous flap of latissimus dorsi muscle is an especially good material for reconstruction. It has axial blood vessel and proper thickness. It is broad and can be rotated with great range and the donor site can be sutured directly