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Application progresses of strain ultrasound elastography in diagnosis and staging of rectal cancer

Jing FU ; Huai ZHAO ; Yaohuang JIANG ; Jin HU ; Fang LI ; Xiaoping LUO

Chinese Journal of Medical Imaging Technology.2017;33(9):1425-1427. doi:10.13929/j.1003-3289.201611098

Trans-rectal ultrasound is widely used in the diagnosis of rectal cancer.Elastography technique is based on the endorectal conventional ultrasound and can assess tumor stiffness and further detect the characteristics of tumor.It is helpful to provide more information for the differential diagnosis of rectal cancer,preoperative staging and the chemotherapy efficacy evaluation.The applications of strain elastography in the diagnosis of rectal cancer were reviewed in this article.

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Correlation of impression depth of umbilical cord around neck with blood flow indexes of umbilical artery and fetus middle cerebral artery

Fumei CHEN ; Lihua WANG

Chinese Journal of Medical Imaging Technology.2017;33(9):1371-1375. doi:10.13929/j.1003-3289.201702092

Objective To investigate the correlation value between the impression depth of umbilical cord around neck and the blood flow indexes of middle cerebral artery (MCA) and umbilical artery (UA) in fetus.Methods Totally 139 late pregnancy fetuses of umbilical cord around neck and 28 normal fetuses were enrolled in the study.The systolic maximum velocity/diastolic minimum velocity (S/D),resistence index (RI),pulsatility index (PI) of MCA and UA in fetuses were measured by Doppler ultrasound,and the correlation of the pressure trace depth with MCA and UA blood flow parameters were analyzed.Results The pressure trace depth of umbilical cord around neck and the S/D,RI,PI of MCA were positively correlated (one round of umbilical cord around neck,r=0.32,0.32,0.35,two or more rounds of umbilical cord around neck,r=0.71,0.69,0.53,all P＜0.05).The pressure trace depth of umbilical cord around neck and the S/D,RI,PI of UA had no correlation.Compared with normal fetuses,the parameters of UA had no significant differences in fetuses with umbilical cord around neck (all P＞0.05).The S/D,RI,PI of MCA in fetuses with pressure trace depth ≥0.80 cm and fetuses with two or more rounds of umbilical cord around neck were higher than those of normal fetuses (all P＜0.05).Fetuses with two or more rounds of umbilical cord around neck had obviously increased cesarean rate compared with normal fetuses.Compared with normal fetuses,the fetuses with pressure trace depth ≥0.80 cm had increased abnormal fetal heart rate,prolonged labor time during the second stage (all P＜0.05).Conclusion In late pregnancy fetuses with umbilical cord around neck,the blood flow parameters of MCA are more sensitive than those of UA.The pressure trace depth ≥ 0.80 cm may lead to intrauterine fetal anoxia.

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Comparison of full field digital mammography and digital breast tomosynthesis in predicting size of ductal carcinoma in situ

Ying LIU ; Chunhua LU

Chinese Journal of Medical Imaging Technology.2017;33(9):1349-1352. doi:10.13929/j.1003-3289.201703018

Objective To compare the accuracy of full field digital mammography (FFDM) and digital breast tomosynthesis (DBT) in predicting size of ductal carcinoma in situ (DCIS).Methods Totally 30 women pateints with DCIS confirmed by histology were analyzed retrospectively.Two radiologists measured the size of the lesions on FFDM,DBT images respectively,and compared with pathological results.Two kinds of inspection methods correlation with pathology were compared with Pearson correlation analysis.Results Size of DCIS measured by doctor 1 and doctor 2 between FFDM and histology had correlation (r=0.857,0.818,both P＜0.01),and those between DBT and histology also had correlation (r=0.924,0.885,both P＜0.01).Intraclass correlation coefficient (ICC) of two doctors was 0.947 on FFDM,and 0.908 on DBT.Conclusion DBT provides a better estimation of the size of DCIS.Two physicians had high consistency for lesion size evaluation.For DCIS with microcalcifications,both FFDM and DBT provide smaller estimations compared with pathology,thus a bigger surgical resection of lesion is needed.

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Coronary CTA combined CT myocardial perfusion imaging in diagnosis of coronary artery disease:Meta-analysis

Xiangyi CAI ; Honglin LI ; Xueqin GUAN ; Jin FANG ; Quan ZHOU

Chinese Journal of Medical Imaging Technology.2017;33(9):1344-1348. doi:10.13929/j.1003-3289.201612117

Objective To assess the diagnostic value of coronary CTA (CCTA) combined myocardial CT perfusion imaging (CTP) in coronary artery disease (CAD) with Meta-analysis.Methods Chinese and English literatures evaluating CCTA combined CTP in diagnosis of CAD in PubMed,Wed of Science,Cochrane Library,China National Knowledge Infrastructure (CNKI) and Wanfang Periodical Database from inception to December 2016 were searched.The extraction was conducted according to the criteria for diagnostic recommended by Cochrane Method Group.The quality of included studies was assessed with quality assessment of diagnostic accuracy studies-2 instrument.The statistical analysis was performed by Meta-disc 1.4 software,the diagnosis efficacy was calculated and the symmetric receiver operating characteristic curves (SROC) was drawn to obtain the area under curve (AUC).Results Five studies involving a total of 611 vessels were included.The pooled sensitivity (SEN),specificity (SPE),diagnostic odds ratio (DOR),positive likelihood ratio (PLR),negative likelihood ratio (NLR) were 0.96 (95％CI [0.92,0.98]),0.91 (95％CI [0.88,0.94],206.14 (95％CI [100,424.94]),9.33 (95％CI [5.57,15.61]),0.06 (95％CI [0.03,0.13]),respectively.The AUC of SROC was 0.977.Conclusion CCTA combined CTP has significant value in diagnosis of CAD.

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MRS application in temporal lobe epilepsy without hippocampal sclerosis

Zijian FAN ; Yongbo ZHANG ; Wenping JU ; Jie LIANG ; Da LI ; Xianliang WANG

Chinese Journal of Medical Imaging Technology.2017;33(9):1326-1330. doi:10.13929/j.1003-3289.201611125

Objective To investigate the application value of MRS in temporal lobe epilepsy (TLE) without hippocampal sclerosis.Methods A retrospective study was conducted in 23 unilateral TLE patients (TLE group) with absence of hippocampal sclerosis and 20 age-matched normal control subjects (control group).All of them underwent conventional MRI and MRS.N-acetyl aspartate (NAA)/creatine (Cr),choline (Cho)/Cr ratios of bilateral hippocampus in 2 groups were analyzed.Eleven of 23 patients underwent surgical treatment,pathological findings and surgical outcomes were evaluated.Results The NAA/Cr ratios of ipsilateral hippocampus significantly decreased compared with that in the contralateral hippocampus (t=-7.97,P＜0.001) and the control group (t=-9.96,P＜0.001).There was no significant difference between the contralateral hippocampus in patients and the control group (t=-1.21,P=0.12).The Cho/Cr ratios of ipsilateral hippocampus in TLE had no significant difference compared with contralateral hippocampus (t=0.50,P=0.31) and the control group (t=-0.59,P=0.28).The pathological findings of the 11 patients who underwent temporal lobe resection indicated small amounts of neuronal loss and unobvious gliosis.Conclusion MRS is helpful in clinical practice to lateralize and localize the epileptogenic foci in the absence of hippocampal sclerosis in patients with TLE.

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Resting-state functional MRI of regional spontaneous brain activity in classical trigeminal neuralgia patients

Wenjuan XIONG ; Laichang HE ; Yongming TAN ; Fuqing ZHOU ; Xianjun ZENG ; Honghan GONG ; Zhi LI

Chinese Journal of Medical Imaging Technology.2017;33(9):1321-1325. doi:10.13929/j.1003-3289.201611055

Objective To investigate the alterations of regional spontaneous activity in patients with classical trigeminal neuralgia (CTN) during resting state.Methods Twenty-seven patients with CTN (CTN group) and 27 healthy subjects (control group) were recruited and underwent a rest-state functional MRI.The regional homogeneity (ReHo) analysis was used to compare the differences of regional synchronization of spontaneous brain activity.And correlation tests were performed between ReHo values in the abnormal brain areas and clinical metrics (visual analogue scale and disease duration) of the disease.Results Compared with control group (P＜0.05,Gaussian random field correction),ReHo increased in bilateral primary somatosensory cortex (S1) and primary motor cortex (M1),right supplementary motor area (SMA),inferotemporal cortex and cerebellum,left thalamus,limbic lobe,parahippocampa gyrus,middle and superior temporal gyrus in CTN group;ReHo decreased in bilateral insula,prefrontal cortex and orbitofrontal cortex,right frontal medial cortex and superior temporal gyrus,left anterior cingulate area,supramarginal gyrus and cerebellum in CTN group.ReHo values in right frontal medial cortex was negatively correlated with the course of disease (r=-0.45,P=0.03).The ReHo values of left primary sensorimotor cortex were positively correlated with the visual analogue scale scores (r=0.46,P=0.02).Conclusion CTN patients has abnormal functional homogeneity of spontaneous brain activity in regions involved in the pain processing,which can help understanding mechanism of CTN.

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Research progresses of MRI on temporal lobe epilepsy with cognitive impairment

Hongyu YANG

Chinese Journal of Medical Imaging Technology.2017;33(9):1421-1424. doi:10.13929/j.1003-3289.201701053

Temporal lobe epilepsy (TLE) was the most common type of epilepsy.The cognitive function such as memory,language,executive function could be damaged due to recurrent seizures,the life quality of patients decreased further.However,the mechanism of cognitive dysfunction caused by TLE was unclear,no effective treatment could be performed.With the development of MRI and post-processing techniques,DTI,voxel based morphometry and fMRI had been employed to investigate the cerebral structure and network changes in TLE patients with cognitive impairment,which had found cognitive impairment was related to structural and functional changes in some brain regions.This paper reviewed the progresses of brain structural and functional changes of TLE with cognitive impairment.

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Application progresses of optical molecular imaging techniques in cancer

Fan LIU ; Lei SUN ; Jianbo YU

Chinese Journal of Medical Imaging Technology.2017;33(9):1417-1420. doi:10.13929/j.1003-3289.201611145

The molecular imaging technology is a kind of imaging technology which displays the microstructure of tissue,cell and sub cellular level in vivo.It has the characteristics of real time,noninvasive,accurate and sensitive,and can be used for early screening and diagnosis of tumor at the cellular and molecular level.Following the development of bioluminescence and fluorescence imaging,optical molecular imaging technology is making rapidly progression.The application of optical molecular imaging technology in cancer was reviewed in the paper.

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Value of PET/CT in staging and treatment of small cell lung cancer

Yongxin XIAO ; Hong YU ; Shiyuan LIU ; Jing LIU ; Qiong LI ; Yinan CHEN ; Lin ZHU ; Kai NIE

Chinese Journal of Medical Imaging Technology.2017;33(9):1412-1416. doi:10.13929/j.1003-3289.201702098

Small cell lung cancer is the most common primary neuroendocrine malignancy of the lung and is characterized by high malignant degree,rapid doubling time,easy metastasis in early stage and poor prognosis.Accurate staging of small cell lung cancer can formulate personalized therapeutic plans and improve the prognosis of patients.PET/CT can obtain metabolism and anatomical images of the whole body in one scan and improve the diagnostic accuracy and integrity.PET/CT has been widely applied to clinical practice now.PET/CT will play a more and more important role in diagnosis,staging,treatment and prognosis assessment of patients with small cell lung cancer.The value of PET/CT in staging and treatment of small cell lung cancer was reviewed in this article.

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Progresses of biological combined photoacoustic-ultrasonic-magnetoacoustic imaging

Zheng SUN ; Kaixuan YANG

Chinese Journal of Medical Imaging Technology.2017;33(9):1407-1411. doi:10.13929/j.1003-3289.201701066

Biological ultrasonic (US),photoacoustic (PA) and magnetoacoustic (MA) imaging techniques had similar imaging principles and complementary characteristics.Combined US,PA or MA imaging can provide joint images of biological tissues which present complementary information for more comprehensive characterization of tissues in contrast to single imaging technique.The pathological tissues could be precisely located and their morphology and composition could be accurately identified.This review presented current progresses in combined PA-US,MA-US and US-PA-MA imaging techniques,espeically endoscopic imaging,focusing on the technical aspects of integration and their applications in biomedicine.

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