Application of automatic tube current modulation combined with iterative reconstruction in CT scanning of neck / 中华放射医学与防护杂志

Objective To explore application of automatic tube current modulation combined with iterative reconstruction in CT scanning ( non-enhanced and enhanced) of neck. Methods A total of 80 patients with CT scanning of neck were randomly divided into test group(n=40, automatic tube current modulation, iterative reconstruction ) and control group ( n = 40, 200 mAs, filtered-back-projection reconstruction ) . Subjective scores and objective evaluation of two groups were evaluated. Evaluation included image noise ( SD ) of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland, lateral pterygoid muscle and brain tissue. Effective dose ( E ) was compared. Results The E of non-enhanced and enhanced scanning in test group was lower than that of control group with the statistically significant difference(t = -2. 451, -2. 451, P <0. 05). The subjective scores of non-enhanced and enhanced scanning in test group were higher than those of control group with the statistically significant difference (Z = - 1.969, - 2.056, P < 0.05), while SD of thyroid gland, trapezius muscle, sternocleidomastoid muscle, submandibular gland in test group were lower than that of control group with the statistically significant difference ( t =2. 400,2. 516,2. 120,2. 411,4. 134,4. 674, 2. 711,2. 892, P<0. 05). There were no significant differences in SD of lateral pterygoid muscle, brain tissue of non-enhanced and enhanced scanning between two groups (P>0. 05). Conclusions Automatic tube current modulation combined with iterative reconstruction in CT scanning of neck could improve image quality, and reduce effectively radiation dose.

Multidetector computed tomography angiography in clinically suspected hyperacute ischemic stroke in the anterior circulation: an etiological workup in a cohort of Brazilian patients / Angiotomografia computadorizada multidetectores na avaliação da suspeita clínica de acidente vascular encefálico isquêmico hiperagudo da circulação anterior: determinação etiológica precoce em um grupo de pacientes brasileiros

Objective The potential of computed tomography angiography (CTA) was assessed for early determination of stroke subtypes in a Brazilian cohort of patients with stroke. Method From July 2011 to July 2013, we selected patients with suspected hyperacute stroke (< 6 hours). Intracranial and cervical arteries were scrutinized on CTA and their imaging features were correlated with concurrent subtype of stroke. Results Stroke was documented in 50/106 selected patients (47.2%) based on both clinical grounds and imaging follow-up (stroke group), with statistically significant arterial stenosis and vulnerable plaques on CTA. Intracranial large artery disease was demonstrated in 34% of patients in the stroke group. Partial territorial infarct prevailed (86%) while artery-to-artery embolization was the most common stroke mechanism (52%). Conclusion Multidetector CTA was useful for the etiologic work-up of hyperacute ischemic stroke and facilitated the knowledge about the topographic pattern of brain infarct in accordance with its causative mechanism. .

Objetivo Avaliar o potencial da angiotomografia computadorizada multidetectores (ATCM) na determinação etiológica precoce do acidente vascular encefálico (AVE) e correlacionar o mecanismo causal com o padrão de infarto. Método De Julho de 2011 a Julho de 2013, foram selecionados os pacientes com suspeita clínica de AVE hiperagudo. Os achados da ATCM dos vasos intracranianos e cervicais foram correlacionados com a etiologia final do evento. Resultados AVE foi confirmado em 50/106 pacientes (47,2%). Estes apresentaram alterações angiográficas estatisticamente mais relevantes. Aterosclerose dos grandes vasos intracranianos esteve presente em 34% destes pacientes. O padrão radiológico topográfico de infarto mais comum foi o infarto territorial parcial (86%). A embolização arterio-arterial foi o mecanismo mais prevalente (52%). Conclusão A utilização da ATCM traz benefícios na detecção etiológica precoce dos pacientes com suspeita de AVE hiperagudo, além de possibilitar o entendimento do padrão radiológico topográfico de acordo com o mecanismo causal do evento isquêmico. .

Reduction in thyroid dose from neck CT angiography with 64-slice spiral CT with automatic tube current modulation technique / 中华放射医学与防护杂志

Objective To assess the effectiveness of Z-axis automatic tube current modulation ( ATCM) technique with respect to dose reduction and image noise in the thyroid regional tissues during neck computed tomography angiography (CTA). Methods A total of 140 patients underwent neck CTA with 64-slice spiral CT, and were randomized into fixed-tube current group and ATCM group. Objective noise, CTDIw, DLP and mA of each group were recorded. Results The image qualities of all the patients were diagnostically acceptable, though the objective noise of neck in the ATCM group was higher than that in the group of fixed-tube current (P＜ 0.05 ). The radiation doses in the ATCM group [ CTDIw (35.99±1.31 ) mGy, DLP (11 121.39 ±5.51) mGy·cm] were significantly inferior to those in the group of fixed tube current [ CTDIw (43.22±1.42) mGy, DLP (1514.45±5.56) mGy·cm]. Conclusions Compared with fixedtube current technique, ATCM technique could significantly reduce the radiation dose in neck CT with diagnostic acceptability of the image quality.

Thirty Cases of IgA Nephropathy Treated by Differential Diagnosis of Syndromes in TCM / 中医杂志

Thirty caaes diagnosed as lGA nephroparthyby kidney biopay were treated bassed on differential diagnosis of syndromes the cases were divided into several stages via lesion in the lung -kidney (initial stage )lesion in the spleen-kidney (stable atage )and lesion in the liver -kidney (stable atage)and relapsing stage, and were treated by Chinese medicaments accordingly. The results revealed that 10 cases were totally mitigated; 13 cases, markedly alleviated; 4 cases, ameliorated, with only 3 cases ineffective. The total effecitve rate was 90%.Thirty cases diagnosed as IgA nephropathy by kidney biopsy were treated based on differential diagnosis of syndromes. The cases were divided into several stages, viz. lesion in the lung -kidney ( initial stage) , lesion in the spleen - kidney (stable stage) and lesion in the liver -kidney (advanced stage) and relaps-