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Objective To study the prevention and corresponding measures for the allergy of contrast agent in scanning, and discuss the targeted prevention mode.MethodsSelection from June 2015 to August 2016, 400 cases was conducted in the people's hospital of ningbo yinzhou MR enhancement scanning patients as the research object, in the process of the study were randomly divided into control group and experimental group, 200 cases in each group.In the control group, patients were given routine procedure, including psychological counseling, diet control and health, education, etc.All patients were treated with the use of gadolinium bate as a contrast agent and intravenous injection.Compare two sets of contrast agent allergy.ResultsTwo groups of patients showed different levels of allergic reactions.The control group had five mild allergies, one moderate allergy, one severe allergy, and seven cases of allergy.There were two cases of mild allergy, 1 case of moderate allergy, no severe allergies, and 3 cases of allergies.Compared with the experimental group, the difference was statistically significant (P<0.05).ConclusionIn MR enhancement scanning to psychological counseling, diet, health education and other measures, to reduce the probability of contrast media in patients with allergic, have clinical significance.
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Objective:To explore the significance of multiple detector spiral CT multi-phase enhanced scan in differentiating liver tumors.Methods: A total of 141 patients, during from March 2011 to May 2015 in our hospital, pathologically diagnosed as liver tumors were selected to undergo multiple detector spiral CT multi-phase enhanced scan. The different performances and results in CT plain and enhanced scan for diagnosing liver cancer were observed and the sensitivity of CT multi-phase enhanced scan was analyzed.Results: 93 cases were found in CT plain scan; 141 cases were found in the arterial phase, 112 cases were found in portal venous phase and 108 cases were found in extension period in CT multi-phase enhanced scan. The lesion detection rate of CT plain scan was significantly lower than whichever of CT multi-phase enhanced scan(P<0.05); under CT multi-phase enhanced scan, the majority of lesions were typical imaging and could be diagnosed. Using CT multi-phase enhanced scan, the sensitivity of hemangiomas was 88.9%, abscess was 71.4%, focal nodular hyperplasia was 83.3%, primary liver cancer was 81.6%, and liver metastases was 97.8%; the total accuracy was 88.7%.Conclusion: The multiple detector spiral CT multi-phase enhanced scan can accurately identify liver tumor lesion stages, and it can contribute to further clinical treatment.
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Objective To discuss the effect of pre-intervention with acupuncture on gastrointestinal reactions caused by iodinated contrast media during computer tomography (CT) enhanced scan.Method Two hundred patients going to receive CT enhanced scan were randomized into an acupuncture group and a control group by using a random number table, 100 cases each. The control group went fasting 4-6 h before the scan, while the acupuncture group received pre-intervention of acupuncture in addition to fasting. The gastrointestinal reactions during CT enhanced scan and the image quality were compared between the two groups.Result The incidence of gastrointestinal reactions and the incidence of CT image artifact in the acupuncture group was significantly lower than that in the control group (P<0.05).Conclusion Pre-intervention with acupuncture can reduce the gastrointestinal reactions during CT enhanced scan and improve the quality of image.
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Objective To discuss the effect of pre-intervention with acupuncture on gastrointestinal reactions caused by iodinated contrast media during computer tomography (CT) enhanced scan.Method Two hundred patients going to receive CT enhanced scan were randomized into an acupuncture group and a control group by using a random number table, 100 cases each. The control group went fasting 4-6 h before the scan, while the acupuncture group received pre-intervention of acupuncture in addition to fasting. The gastrointestinal reactions during CT enhanced scan and the image quality were compared between the two groups.Result The incidence of gastrointestinal reactions and the incidence of CT image artifact in the acupuncture group was significantly lower than that in the control group (P<0.05).Conclusion Pre-intervention with acupuncture can reduce the gastrointestinal reactions during CT enhanced scan and improve the quality of image.
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Objective To investigate the factors causing exudation of drugs by intravenous contrast medium in CT enhanced scan, and to analyze the corresponding measures. Methods From January 2016 to June 2017 in the First People's Hospital of Jiande City 61 cases of drug extravasation enhanced CT scanning in patients as the research object, through the observation of the drug leakage factors to agents in this group of patients with intravenous contrast and record, in order to find out measures. Results The statistics show, this group of patients with drug extravasation factors: 12 years of age, the incidence rate was 63.93％ (39/61) injection velocity; the incidence rate of 3.0～4.0ml/s was 70.49％ (42/61);small vein injection of vascular forearm 80.33％ (49/61); osmotic pressure, the incidence rate of 300mOsm/kgH2O was 83.61％ (51/61). Conclusion CT scan causes intravenous contrast agent oozing drugs are various, according to the specific selection of patients with drug exudation measures, can effectively improve the patients clinicalcharacteristics of blood stasis, swelling, pain, and has important practical value.
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Objective To investigate perfusion imaging and parameters of normal pancreas by dual-source CT and to evaluate the appropriate perfusion imaging scan.Methods Sixty-six subjects with normal pancreas underwent low-dose pancreatic perfusion and plain scan.CT images were sent to a separate workstation via a network.The blood flow (BF)and blood volume (BV)of pancreas head,body and tail were measured using the VPCT Body software and analyzed by one-way ANOVA.Then the time-density curve of pancreas was drawn,and the enhancement peak time and the corresponding CT value were also measured.Results The average BF values of pancreas head,body and tail were (1 1 6.09 ± 31.83)mL·100 g-1 ·min-1 ,(1 1 9.72±32.50)mL·100 g-1 ·min-1 , (1 14.65±31.42)mL·100 g-1 ·min-1 ,and the mean BV values were (29.83 ±1 9.07)mL/100 g,(30.39 ± 1 9.38)mL/100 g, (28.82±1 9.22)mL/100 g,respectively.The perfusion parameters in different pancreatic parts were not statistically different.The mean enhancement peak time was (27.92 s±4.52)s,(28.02±5.34)s in pancreas head,(27.40±4.36)s in pancreas body,(27.34±4.57)s in pancreas tail.On plain image,the average CT value of pancreas was (41.43±5.88)HU.However,on enhanced image,the mean CT value was (95.96±18.44)HU in normal pancreas [(96.73±19.71)HU in pancreas head,(98.45±17.52)HU in body,(92.69±18.1 7)HU in tail].Conclusion The perfusion parameters including blood flow and blood volume in pancreatic head,body and tail are identical. The mean enhancement peak time is (27.92±4.52)s,and the corresponding enhancement CT value is (95.96±18.44)HU.
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Objective To compare the virtual non-enhanced chest CT (VNCT)generated from spectral CT with conventional non-enhanced chest CT in patients with lung disease in terms of CT number accuracy and image quality.Methods A total of 30 patients with lung disease proved by pathology underwent the conventional non-enhanced thoracic CT and contrast enhanced CT with spectral imaging mode in arterial phase (AP)and venous phase (VP).The VNCT images were reconstructed based on the enhanced spectral CT imaging data.The mean CT number,signal to noise ratio (SNR)for the lesions and image quality score were obtained and compared between the true non-contrast CT (TNCT)and the VNCT (including AP and VP)with paired t test.Results The mean±standard deviation for CT number were (38.74±5.17)HU,(39.08±5.07)HU and (38.96± 5.18)HU for TNCT,VNCT at AP and VNCT at VP,respectively, with no statistical difference (P>0.05).All 3 sets of images demonstrated acceptable image quality,even though there were statistically significant differences in the SNR value and image quality score.The mean ± standard deviation values for SNR were 4.74±0.42 with TNCT, 3.79 ± 0.5 1 with VNCT at AP and 3.77 ± 0.39 with VNCT at VP (P <0.05),and the image quality scores were 5.00 ±0.00 with TNCT,4.17±0.65 with VNCT at AP and 4.17±0.53 with VNCT at VP (P<0.05).Conclusion In patients with lung disease,the vir-tual non-enhanced CT images generated from spectral CT provide accurate CT numbers for lesions and acceptable image quality com-pared with the true non-contrast CT.VNCT may be used to replace TNCT to improve work flow and reduce radiation dose.
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Objective:To evaluate the value of multilayer dynamic CT scan in the preoperative diagnosis and staging of rectal carcinoma.Methods: CT findings of a retrospective analysis of 38 cases with pathologically confirmed cancer, study characteristics of partial image, Adjacent tissue invasion and distant organ metastasis, And compared with postoperative pathology.Results:Intraluminal mass 15 cases, Intraluminal mass associated with of bowel wall thickening 12 cases, The a tumor breakthrough serosa layer and surrounding tissue invasion 7 cases; Tumor invasion of adjacent organs or with distant metastasis 4 cases; consistent rate compared with pathological was 81.5%(31/38).Conclusion: Multilayer enhanced CT scan is well consistent rate in the diagnosis and staging of rectal cancer compared with pathologic staging, Preoperative contrast enhanced CT scanning have guiding significance for clinical choice of surgical approach, With higher value of clinical application.
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Objective To research the value of dynamic CT enhancement in diagnosing lung cancer.Methods 35 patients with benign disease and 25 patients with lung cancer underwent dynamic CT scan,the results of CT were analysed in comparison with that of pathological specimens,the relationship between the dynamic CT enhancement phenomena and histological results.Results CT enhanced peak,the enhanced ratio of focus and aorta,the form of enhancement and time-dense curve were different between two groups.CT enhanced peak was related to the histological types and clinical stages of pulmonary cacinoma,and metastasis of lymph nodes.Conclusion Dynamic CT enhanced scan can reflect the characteristic of blood in lung cancer.The invasion and metastasis in lung carcinoma can be predicted according to the CT enhanced peak.
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Objective To detect the value of qualitative and orientating diagnosis in the degeneration stage of cerebral cysticercosis with Gd-DTPA enhanced MR. Methods Sixty-nine cases of cerebral cysticercosis were diagnosed by enhanced MR as degeneration stage, and confirmed by immunological examination and/or by surgery. MR plain scanning was conducted for the same cases. Results The plain scanning showed single or multiple lesions with long T1 and long T2 signals, and the enhanced scanning showed nodular or annular lesions. The diameter of the lesion after enhanced scan was not more than 22mm with an average value of 8.1mm. Some cases showed single lesion on plain scanning but showed multiple lesions after enhanced scan. Conclusion The enhanced MR shows more typical features of the degeneration stage cerebral cysticercosis. It can define the number, position and range of the lesions, and can improve the accuracy of differential diagnosis, and therefore be of importance in formulating treatment scheme and prognosis.