[Infrared spectroscopic study on leaf senescence of evergreen tree].

In order to investigate plant physiological process of leaf senescence and aging, Fourier transform infrared (FTIR) spectroscopy was used to study the young, mature, and old yellow leaves from seven species of evergreen trees. The spectra of the leaves from different growing period are different in the region of 1 800-700 cm(-1). The absorption ratios A1 070/A2 927, A1 070/A1 160 were used to evaluate the relative changes of polysaccharides, and A1 318/A2 922 was used to estimate the change of calcium oxalate during leaf senescence.

[Research on rice blast, corn and broad bean rust leaves by FTIR spectroscopy].

Fourier transform infrared Spectroscopy (FTIR) was used to study healthy and diseased leaves of rice, corn, and broad bean. The results show that the infrared spectra of the leaves are mainly composed of the absorption bands of proteins and polysaccharide. The spectra are similar, but the differences were observed in the peak positions, shapes, and absorption ratios.

Primary angiosarcoma of the spleen as depicted on computed tomography.

Primary angiosarcoma of the spleen is rare, usually widespread or has a splenic rupture by the time of presentation, and almost always has poor prognosis; early radiological diagnosis is necessary for improving the survival rate. We report two special cases of this disease. Both patients did not have pathologic metastasis or splenic rupture, but their computed tomography (CT) manifestations were distinct from each other and had uncommon characteristics.

[FTIR spectroscopic study of broad bean diseased leaves].

In the present paper, broad bean rust, fusarium rhizome rot, broad bean zonate spot, yellow leaf curl virus and normal leaves were studied using Fourier transform infrared spectroscopy combined with chemometrics. The results show that the spectra of samples were similar, only with minor differences in absorption intensity of several peaks. Second derivative analyses show that the significant difference of all samples was in the range of 1200-700 cm(-1).

[Superior attachment of renal fascia: a study with multidetector computed tomography and three dimensional reconstruction].

Objective: To observe the superior attachment of renal fascia (RF) and the perirenal space (PS) in order to identify the spreading pathway of inflammatory and malignant tumors.

Methods: Multidetector computed tomography (MDCT), with double phase enhancement scanning and three dimensional reconstruction of images were performed on 121 healthy adults. The RF attachments upward were observed and their connections with the PS were evaluated.

Correlation between tumor perfusion and lipiodol deposition in hepatocellular carcinoma after transarterial chemoembolization.

Purpose: To study the correlation of tumor perfusion with lipiodol deposition in hepatocellular carcinoma (HCC) after transarterial chemoembolization with multidetector computed tomography (MDCT) perfusion imaging.

Materials And Methods: MDCT perfusion imaging was performed in 24 patients with HCC 1 to 7 days before chemoembolization. The computed tomography (CT) perfusion parameters, such as hepatic arterial perfusion (HAP), hepatic portal perfusion (HPP), total liver perfusion (TLP), and hepatic arterial perfusion index (HAPI), were calculated with the slope method.

[Differentiation of Rhododendron based on the infrared spectra of petals].

Several techniques were used to identify and classify plants. Mid-infrared spectroscopy combined with appropriate software was used in an attempt to differentiate different subgenus from Rhododendron. Fourier transform infrared (FTIR) spectroscopy was used for obtaining vibrational spectra of 46 petals from Rhododendron.

Perfusion computed tomography evaluation of angiogenesis in liver cancer.

Objective: To investigate the value of computed tomography (CT) perfusion imaging for assessment of angiogenesis in liver cancer.

Methods: Twenty-one patients with histologically proven liver cancer underwent CT perfusion examination. We compared the following perfusion parameters in the tumour area versus the non-tumour area: total blood flow (TBF), hepatic arterial perfusion (HAP), hepatic portal perfusion (HPP) and hepatic arterial perfusion index (HAPI).

[Differentiation of Amanita hemibapha (Berk. & Broome) Sacc. subsp. hemibapha and Amanita hemibapha var. ochracea Zhu L. Yang by Fourier transform infrared spectroscopy].

In order to demonstrate the ability of Fourier transform infrared (FTIR) spectroscopy for the differentiation of macro-fungi at variety level, FTIR spectroscopy was used to obtain vibrational spectra of Amanita hemibapha (Berk. & Broome) Sacc. subsp.

[Relationship between renal apparent diffusion coefficient and renal interstitial fibrosis: preliminary study].

Objective: To explore the relationship between renal ADCs (apparent diffusion coefficient values) and renal interstitial fibrosis (RIF) grades.

Methods: Twenty four patients with chronic renal diseases and 48 healthy volunteers (control group) were examined with SS-EPI DWI at 3. OT MR.

[Time-density curve of 16-slice spiral CT quantitatively distinguishes true from false lumen of aortic dissection].

Objective: To use the time-density curves (TDCs) to quantitatively distinguish the true from false lumen of aortic dissection (AD).

Methods: 28 cases with AD underwent the dynamic scanning of 16-slice spiral computer tomography (SCT). We used the CT Dynamic Evaluation software to determine the circulation times of the true and false lumens of the AD and got the TDCs, and then analyzed the circulation times and CT values of the true and false lumens by using matched t-test for dependent samples.

[Identification of Pu' er tea by Fourier transform infrared spectroscopy].

In the present paper, Fourier transform infrared spectroscopy (FTIR) was used to determine unzymic and zymic Pu'er tea of different grade produced in Simao, Yunan Province. Because of the different processing technology, different proportion of chemical constituents exists in the unzymic and zymic Pu'er tea. And although there is a great mass of similarity in infrared spectrum, the results still show differences in the characteristic peaks of infrared spectrum between unzymic and zymic Pu'er tea.

[Non-small cell lung cancer evaluated by first pass dynamic contrast-enhanced 16-slice spiral CT: correlation of tumor vascularity with pathological characteristics].

Objective: To investigate the role of first pass dynamic 16-slice spiral computed tomography in the evaluation of tumor angiogenesis in patients with non-small cell lung cancer (NSCLC) and to assess its importance in predicting pathologic characteristics.

Methods: The first pass dynamic 16-slice spiral computed tomography was performed in 33 patients with NSCLC. Their peak heights (PH) were measured with dynamic evaluation software.

Liver volume variation in patients with virus-induced cirrhosis: findings on MDCT.

Objective: The objective of our study was to establish a standard liver volume formula and explore the correlation between hepatic lobe variations in patients with virus-induced cirrhosis and the severity of disease by measuring the volume of the whole liver, the left lateral segment, and the caudate lobe using 16-MDCT.

Materials And Methods: The volume and per-body surface area (BSA) volume of the whole liver, the left lateral segment, and the caudate lobe were calculated in 113 patients with normal livers and 101 patients with virus-induced cirrhosis who underwent volume CT. The proportion of the left lateral segment volume and the proportion of the caudate lobe volume to the total liver volume, the volume index, and the volume change ratio were also calculated, and these data were grouped by Child-Pugh classification and compared.

[The relationship between 31P magnetic resonance spectroscopy and the histopathology of livers of chronic viral hepatitis patients].

Objective: To investigate the correlations between 31P-magnetic resonance spectroscopy (MRS) findings and histopathological grading and staging of the livers of chronic viral hepatitis patients.

Methods: Thirty-one patients with chronic viral hepatitis and 18 healthy volunteers were enrolled for this study. All of them underwent routine MRI plain scan and 31P-MRS of their livers.

[CT features and anatomic-pathologic basis of the 16-slice spiral CT for aortic dissection].

Objective: To determine the CT features and anatomic-pathologic basis of the 16-slice Spiral CT (SCT) for aortic dissection (AD).

Methods: Forty-two cases with typical aortic dissection (AD) and 12 cases with intramural hematoma (IMH) underwent 16-slice SCT, performed with unenhanced, contrast-enhanced scanning and three-dimensional reconstruction. More attention was put on the true and false lumen, intimal flap, the entry tear and the involvement of branches of AD.

Amplitude of low frequency fluctuation within visual areas revealed by resting-state functional MRI.

Most studies of resting-state functional magnetic resonance imaging (fMRI) have applied the temporal correlation in the time courses to investigate the functional connectivity between brain regions. Alternatively, the power of low frequency fluctuation (LFF) may also be used as a biomarker to assess spontaneous activity. The purpose of the current study is to evaluate whether the amplitude of the LFF (ALFF) relates to cerebral physiological states.

[A study of correlation between the blood supply types of PHcc on spiral CT and the level of VEGF expression in PHcc].

Objective: To study the correlation between the blood supply types of primary hepatocellar carcinoma (PHcc) on Spiral CT and the level of vascular endothelial growth factor (VEGF) expression in PHcc for improvement in treatment strategies and prognostication.

Methods: Forty-five cases of PHcc identified by operation and pathology were investigated. Immunohistochemistry staining in SP was performed.

[An electromagnetic navigation system in interventional radiology].

This paper introduces the operation principle, experimental research and clinical applications of an electromagnetic navigation system in interventional radiology and looks forward to the prospects for its clinical applications.

Magnetic resonance imaging of hepatocellular carcinoma induced by diethylnitrosamine in Sprague-Dawley rats.

Background: Diethylnitrosamine (DENA) is able to induce various benign and malignant liver lesions in rats with a high success rate and a low mortality rate. It provides a more appropriate model that better simulates the various lesions occurring in humans than the usual model of tumor implantations. The aim of the present study was to evaluate MRI liver examination in Sprague-Dawley (SD) rats as a routine method to detect hepatocellular carcinoma (HCC) nodules induced by DENA and to follow up their growth.

Polyvinyl alcohol and gelatin sponge particle embolization of splenic artery pseudoaneurysm complicating chronic alcoholic pancreatitis.

Aim: To assess the effectiveness of and complications associated with polyvinyl alcohol (PVA) and gelatin sponge particles embolization of splenic artery pseudoaneurysm complicating chronic alcoholic pancreatitis.

Methods: A 42-year-old man with splenic artery pseudo-aneurysm formation secondary to chronic alcoholic pancreatitis was admitted. We used PVA and gelatin sponge particles embolization of splenic artery pseudoaneurysm by superselective embolization techniques.

[CT differentiation of renal angiomyolipoma and renal cell carcinoma].

Objective: To improve the diagnosis of atypical renal angiomyolipoma (RAML) by use of CT to differentiate RAML from renal cell carcinoma (RCC).

Methods: We retrospectively analyzed the CT manifestations with dual-phase enhanced contrast study in 36 cases of RAML (with 57 lesions) and 46 cases of RCC. 25 lesions of RAML and all RCC were histologically confirmed.