目的比较硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 心肌血流灌注显像与^(18)F-FDG PET 心肌代谢显像评估心肌活力的价值。方法既往有心肌梗死史伴左心功能不全经冠状动脉造影确诊为冠心病的患者36例,行二日法静息和硝酸甘油介入^(99)Tc...目的比较硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 心肌血流灌注显像与^(18)F-FDG PET 心肌代谢显像评估心肌活力的价值。方法既往有心肌梗死史伴左心功能不全经冠状动脉造影确诊为冠心病的患者36例,行二日法静息和硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 显像,并在1周内再行^(18)F-FDG PET 心肌代谢显像及静息超声心动图检查。将左心室分成13个节段,分析超声心动图室壁运动,并分析相同节段^(99)Tc^m-tetrofosmin 与^(18)F-FDG 的相对摄取比值,以^(99)Tc^m-tetrofosmin 摄取比值55%,^(18)F-FDG 摄取比值50%为判断心肌活力有无的阈值。以 k 统计比较3种方法的一致性。结果超声心动图示131个节段呈无运动或反向运动。^(99)Tc^m-tetrofosmin 静息显像示其中78个节段(60%)心肌有活力,53个节段(40%)无活力。该53个节段中14个(26%)在硝酸甘油介入后可见再填充,余39个节段无改变。在^(18)F-FDG PET 显像中,硝酸甘油介入显像再填充节段的心肌放射性摄取明显增高。再填充节段与无填充节段比较,心肌 FDG 摄取分别为(76±15)%和(58±17)%,差异有统计学意义(P<0.01)。硝酸甘油介入显像中,92个心肌节段(70%)有活力,39个无活力。tetrofosmin静息显像评估心肌活力与 FDG PET 显像比较,k 值为0.35,而硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT与^(18)F-FDG PET 显像结果比较,k 值为0.53。结论硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 显像可提高对心肌活力的检测能力,与^(18)F-FDG PET 心肌代谢显像有很好的一致性。展开更多
Heart failure is a dynamic condition with high morbidity and mortality and its prognosis should be reassessed frequently, particularly in patients for whom critical treatment decisions may depend on the results of pro...Heart failure is a dynamic condition with high morbidity and mortality and its prognosis should be reassessed frequently, particularly in patients for whom critical treatment decisions may depend on the results of prognostication. In patients with heart failure, nuclear cardiology techniques are useful to establish the etiol-ogy and the severity of the disease, while fewer studies have explored the potential capability of nuclear cardi-ology to guide cardiac resynchronization therapy （CRT） and to select patients for implantable cardioverter defbrillators （ICD）. Left ventricular synchrony may be assessed by radionuclide angiography or gated single-photon emission computed tomography myocardial perfusion scintigraphy. These modalities have shown promise as predictors of CRT outcome using phase analysis. Combined assessment of myocardial viability and left ventricular dyssynchrony is feasible using posi-tron emission tomography and could improve conven-tional response prediction criteria for CRT. Preliminary data also exists on integrated positron emission tomog-raphy/computed tomography approach for assessing myocardial viability, identifying the location of biven-tricular pacemaker leads, and obtaining left ventricular functional data, including contractile phase analysis. Fi-nally, cardiac imaging with autonomic radiotracers may be useful in predicting CRT response and for identifying patients at risk for sudden cardiac death, therefore po-tentially offering a way to select patients for both CRT and ICD therapy. Prospective trials where imaging is combined with image-test driven therapy are needed to better defne the role of nuclear cardiology for guiding device therapy in patients with heart failure.展开更多
BACKGROUND： Literatures have reported that the density changes of dopamine transporter is negatively correlated with the severity degree and grading of disease condition of Parkinson disease （PD）. However, the dist...BACKGROUND： Literatures have reported that the density changes of dopamine transporter is negatively correlated with the severity degree and grading of disease condition of Parkinson disease （PD）. However, the distribution ofdopamine transporter in each nucleus of corpora striatum at each period is still unclear. OBJECTIVE： To observe the radioactive uptake distribution of dopamine transporter in bilateral corpora striata of patients with different stages of PD using single photon emission computed tomography （SPECT）, and make a comparison with healthy controls. DESIGN： Case-control analysis. SETTING： Department of Imageology, Second Hospital Affiliated to Guangzhou University of Chinese Medicine. PARTICIPANTS： Thirty patients with PD admitted to Second Hospital Affiliated to Guangzhou University of Traditional Chinese Medicine between January and December 2005 were recruited. The involved patients, 19 male and 11 female, were aged from 36 to 80 years and with disease course of 2.5 months to 10 years. They all met the clinical diagnosis criteria of Britain Parkinson＇s disease Association Think Tank; Following Hoehn-Yahr grading： grade Ⅰ ： unilateral morbidity; grade Ⅱ： bilateral morbidity, but without balance disorder; grade Ⅲ： bilateral morbidity, accompanied with early posture balance disorder; grade Ⅳ： severe morbidity, needs more help; grade V ： without help, only in bed or wheelchair. There were 11 patients with mild PD （grade Ⅰ - Ⅱ ）, 9 patients with moderate PD （grade Ⅲ） and 10 patients with advanced PD （grade Ⅳ - Ⅴ ）. Meanwhile, 6 healthy persons were selected as normal controls. Informed consents were obtained from all the subjects. METHODS： Twenty-four hours after withdrawal of PD drugs, 30 patients with PD and 6 healthy controls took kalium perchloricum 400 mg orally. After lying down for 30 minutes, all the subjects were intravenously injected with 740 MBq 99Tc m-TRODAT-1 （Jiangsu Institute of Atomic Medicine, Batch No. 20040310） at e展开更多
Background Midgastric transverse band （MTB） was first observed over 100 years ago, after that many researchers worked on the subject postulated its physiologic role and the role in gastrointestinal diseases, but its...Background Midgastric transverse band （MTB） was first observed over 100 years ago, after that many researchers worked on the subject postulated its physiologic role and the role in gastrointestinal diseases, but its function remains unclear. With progress of imaging methods, the nature of MTB is unveiling. In this study we investigated the effect of MTB on the gastric empting delay in functional dyspepsia （FD） and explored the mechanism. Methods A total of 60 patients with FD and 65 age- and sex-matched healthy people who served as controls were studied. With ^99mTc-DTPA labeled semi-solid fat-parched flour served as test meal, gastric empting was examined in all subjects by using single photon emission computed tomography. Test meal was designated as general （60 g fat-parched flour） or large （80 g fat-parched flour） meal. Stomach was divided into proximal and distal parts by MTB. Half gastric empting time, areas of different gastric parts, intragastric food distribution and MTB width were tested with in given times. Results Patients with FD showed a delayed gastric empting and increased intragastric residue. Global and regional gastric erupting velocity was decreased. The areas of distal stomach and MTB were significantly greater in the FD patients than in the controls. Throughout the whole test period a distal stomach-dominated food distribution was shown. Those who took a large meal had longer half gastric empting time and greater MTB area than those who took a general meal. Conclusions Gastric empting delay is related to enlarged MTB area. Some dyspeptic symptoms may be induced by abnormal distribution and increased retention of food in distal stomach. MTB, being like atriaventricular valve that controls blood flow in heart, regulates transport, distribution, and empting of food in the stomach.展开更多
文摘目的比较硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 心肌血流灌注显像与^(18)F-FDG PET 心肌代谢显像评估心肌活力的价值。方法既往有心肌梗死史伴左心功能不全经冠状动脉造影确诊为冠心病的患者36例,行二日法静息和硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 显像,并在1周内再行^(18)F-FDG PET 心肌代谢显像及静息超声心动图检查。将左心室分成13个节段,分析超声心动图室壁运动,并分析相同节段^(99)Tc^m-tetrofosmin 与^(18)F-FDG 的相对摄取比值,以^(99)Tc^m-tetrofosmin 摄取比值55%,^(18)F-FDG 摄取比值50%为判断心肌活力有无的阈值。以 k 统计比较3种方法的一致性。结果超声心动图示131个节段呈无运动或反向运动。^(99)Tc^m-tetrofosmin 静息显像示其中78个节段(60%)心肌有活力,53个节段(40%)无活力。该53个节段中14个(26%)在硝酸甘油介入后可见再填充,余39个节段无改变。在^(18)F-FDG PET 显像中,硝酸甘油介入显像再填充节段的心肌放射性摄取明显增高。再填充节段与无填充节段比较,心肌 FDG 摄取分别为(76±15)%和(58±17)%,差异有统计学意义(P<0.01)。硝酸甘油介入显像中,92个心肌节段(70%)有活力,39个无活力。tetrofosmin静息显像评估心肌活力与 FDG PET 显像比较,k 值为0.35,而硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT与^(18)F-FDG PET 显像结果比较,k 值为0.53。结论硝酸甘油介入^(99)Tc^m-tetrofosmin SPECT 显像可提高对心肌活力的检测能力,与^(18)F-FDG PET 心肌代谢显像有很好的一致性。
文摘Heart failure is a dynamic condition with high morbidity and mortality and its prognosis should be reassessed frequently, particularly in patients for whom critical treatment decisions may depend on the results of prognostication. In patients with heart failure, nuclear cardiology techniques are useful to establish the etiol-ogy and the severity of the disease, while fewer studies have explored the potential capability of nuclear cardi-ology to guide cardiac resynchronization therapy （CRT） and to select patients for implantable cardioverter defbrillators （ICD）. Left ventricular synchrony may be assessed by radionuclide angiography or gated single-photon emission computed tomography myocardial perfusion scintigraphy. These modalities have shown promise as predictors of CRT outcome using phase analysis. Combined assessment of myocardial viability and left ventricular dyssynchrony is feasible using posi-tron emission tomography and could improve conven-tional response prediction criteria for CRT. Preliminary data also exists on integrated positron emission tomog-raphy/computed tomography approach for assessing myocardial viability, identifying the location of biven-tricular pacemaker leads, and obtaining left ventricular functional data, including contractile phase analysis. Fi-nally, cardiac imaging with autonomic radiotracers may be useful in predicting CRT response and for identifying patients at risk for sudden cardiac death, therefore po-tentially offering a way to select patients for both CRT and ICD therapy. Prospective trials where imaging is combined with image-test driven therapy are needed to better defne the role of nuclear cardiology for guiding device therapy in patients with heart failure.
文摘BACKGROUND： Literatures have reported that the density changes of dopamine transporter is negatively correlated with the severity degree and grading of disease condition of Parkinson disease （PD）. However, the distribution ofdopamine transporter in each nucleus of corpora striatum at each period is still unclear. OBJECTIVE： To observe the radioactive uptake distribution of dopamine transporter in bilateral corpora striata of patients with different stages of PD using single photon emission computed tomography （SPECT）, and make a comparison with healthy controls. DESIGN： Case-control analysis. SETTING： Department of Imageology, Second Hospital Affiliated to Guangzhou University of Chinese Medicine. PARTICIPANTS： Thirty patients with PD admitted to Second Hospital Affiliated to Guangzhou University of Traditional Chinese Medicine between January and December 2005 were recruited. The involved patients, 19 male and 11 female, were aged from 36 to 80 years and with disease course of 2.5 months to 10 years. They all met the clinical diagnosis criteria of Britain Parkinson＇s disease Association Think Tank; Following Hoehn-Yahr grading： grade Ⅰ ： unilateral morbidity; grade Ⅱ： bilateral morbidity, but without balance disorder; grade Ⅲ： bilateral morbidity, accompanied with early posture balance disorder; grade Ⅳ： severe morbidity, needs more help; grade V ： without help, only in bed or wheelchair. There were 11 patients with mild PD （grade Ⅰ - Ⅱ ）, 9 patients with moderate PD （grade Ⅲ） and 10 patients with advanced PD （grade Ⅳ - Ⅴ ）. Meanwhile, 6 healthy persons were selected as normal controls. Informed consents were obtained from all the subjects. METHODS： Twenty-four hours after withdrawal of PD drugs, 30 patients with PD and 6 healthy controls took kalium perchloricum 400 mg orally. After lying down for 30 minutes, all the subjects were intravenously injected with 740 MBq 99Tc m-TRODAT-1 （Jiangsu Institute of Atomic Medicine, Batch No. 20040310） at e
文摘Background Midgastric transverse band （MTB） was first observed over 100 years ago, after that many researchers worked on the subject postulated its physiologic role and the role in gastrointestinal diseases, but its function remains unclear. With progress of imaging methods, the nature of MTB is unveiling. In this study we investigated the effect of MTB on the gastric empting delay in functional dyspepsia （FD） and explored the mechanism. Methods A total of 60 patients with FD and 65 age- and sex-matched healthy people who served as controls were studied. With ^99mTc-DTPA labeled semi-solid fat-parched flour served as test meal, gastric empting was examined in all subjects by using single photon emission computed tomography. Test meal was designated as general （60 g fat-parched flour） or large （80 g fat-parched flour） meal. Stomach was divided into proximal and distal parts by MTB. Half gastric empting time, areas of different gastric parts, intragastric food distribution and MTB width were tested with in given times. Results Patients with FD showed a delayed gastric empting and increased intragastric residue. Global and regional gastric erupting velocity was decreased. The areas of distal stomach and MTB were significantly greater in the FD patients than in the controls. Throughout the whole test period a distal stomach-dominated food distribution was shown. Those who took a large meal had longer half gastric empting time and greater MTB area than those who took a general meal. Conclusions Gastric empting delay is related to enlarged MTB area. Some dyspeptic symptoms may be induced by abnormal distribution and increased retention of food in distal stomach. MTB, being like atriaventricular valve that controls blood flow in heart, regulates transport, distribution, and empting of food in the stomach.
