MRI在卵巢子宫内膜异位囊肿术前诊断中的应用价值

目的探讨MRI在卵巢子宫内膜异位囊肿术前诊断中的应用价值。方法回顾性2015年1月~2018年5月我院手术病理证实的15例共36个卵巢子宫内膜异位囊肿的临床及影像学资料。所有患者术前均行1.5TMRI常规T1WI、T2WI、抑脂序列及DWI序列检查。结果与手术病理结果对照,MRI诸序列均可全部显示36个子宫内膜异位囊肿。囊肿位于两侧卵巢10例,位于左侧3例,右侧2例。36个子宫内膜异位囊肿中,呈类圆形14个、椭圆形9个、葫芦形7个、不规则形6个。囊肿大小:8mm×7mm^89mm×54mm。呈T1WI低T2WI高抑脂序列高DWI高28个,呈T1WI低T2WI高抑脂序列高DWI高5个,诸序列信号混杂3个(T2WI伴黑点征2个)。10例伴“卫星囊”,5例囊内伴分隔,4例伴小破口及高信号影外突而呈尖角征。与手术病理比较,本组MRI诊断准确率为100%。结论卵巢子宫内膜异位囊肿有较为特征性的MRI表现,MRI在术前诊断及鉴别诊断中具有重要价值。

人糖原脱枝酶基因在染色体上的定位研究

人糖原脱枝酶具有糖原降解所必需的寡葡聚糖转移酶和α-Ⅰ,6-糖苷酶的催化活性,该酸缺乏则引起Ⅲ型糖原贮积症。最近已克隆出为人肌肉组织糖原脱枝酶编码的cDNA。经人—鼠杂种细胞嵌板分析,该cDNA克隆被定位于人Ⅰ染色体,进一步用染色体原位杂交技术进行区域定位,确定糖原脱枝酶基因位于lp21。

The Respiratory Prosody of Seven-Syllable Modem-Style Poems Chanted in Cantonese

The paper focuses on the respiratory prosody of seven-syllable modem-style poems chanted in Cantonese, especially the relationship between respiratory prosody and sentential pause-extension. By collecting and analyzing respiratory and acoustic-phonetic signals simultaneously, this research reveals a two level chest and abdominal breath reset in the respiratory signals： （1） In the first level （L1）, the breath reset appears at the beginning or the end of the clause. （2） In the second level （L2）, the breath reset appears in the middle of the clause, of which the position relates to different tone patterns. There is a strong connection between respiratory prosody and the sentential pause-extension when chanting the seven-syllable modem-style poems in Cantonese： with L1 breath reset corresponding to the longest pause-extension at the end of the clause, while L2 breath reset corresponding to the longer pause-extension in the middle of the clause, usually falling at the end of the second syllable of the clause with tone pattern of Level-start and Level-end, or at the end of the fourth syllable of the clause with other tone patterns.