Measurement of muon neutrino quasielastic scattering on a hydrocarbon target at Eν ~ 3.5 GeV

We report a study of ν(μ) charged-current quasielastic events in the segmented scintillator inner tracker of the MINERvA experiment running in the NuMI neutrino beam at Fermilab. The events were selected by requiring a μ- and low calorimetric recoil energy separated from the interaction vertex. We measure the flux-averaged differential cross section, dσ/dQ², and study the low energy particle content of the final state. Deviations are found between the measured dσ/dQ² and the expectations of a model of independent nucleons in a relativistic Fermi gas. We also observe an excess of energy near the vertex consistent with multiple protons in the final state.

Measurement of muon antineutrino quasielastic scattering on a hydrocarbon target at Eν ~ 3.5 GeV

We have isolated ν(μ) charged-current quasielastic (QE) interactions occurring in the segmented scintillator tracking region of the MINERvA detector running in the NuMI neutrino beam at Fermilab. We measure the flux-averaged differential cross section, dσ/dQ², and compare to several theoretical models of QE scattering. Good agreement is obtained with a model where the nucleon axial mass, M(A), is set to 0.99 GeV/c² but the nucleon vector form factors are modified to account for the observed enhancement, relative to the free nucleon case, of the cross section for the exchange of transversely polarized photons in electron-nucleus scattering. Our data at higher Q² favor this interpretation over an alternative in which the axial mass is increased.

Management of small renal masses--update 2011

RATIONALE

The management of renal parenchymal tumors has known many changes over time, a trend that continues today, as a result of technological advances, clinical research and improved diagnostic and therapeutic tools. Unfortunately, conventional cancer treatments--chemotherapy and radiotherapy have proven ineffective and modern approaches such as immunotherapy, angiogenesis inhibitors, though they enjoyed an initial enthusiasm, subsequent studies have shown limited and controversial effects. Thus, surgery remains the gold standard therapy for this type of cancer. The options for the treatment of RCC are numerous, with options that have advantages and disadvantages, with oncological results, in most cases, positive at five years and with different impact on cancer specific survival. It is difficult to compare the results, as these are different techniques with various instruments and intraoperative steps, with more questionable inclusion criteria, selection biases and prosecution, with a tendency for preferential enrollment, different reasons to why randomized prospective studies have not been performed until today.

OBJECTIVE

This article is a review of the diagnosis and methods of treatment of small renal masses 2011.

CONCLUSION

At the beginning of the new millennium, kidney cancer, with all the arsenal of techniques and methods of ablative surgery, remains a potentially fatal disease for a high percentage of patients, and the decision to choose a treatment or another should be taken with responsibility, depending on currently existing medical records, the degree of expertise and not based on subjective or other non-standard parameters.

Morphological aspects of the kidney: can normality be predicted?

PURPOSE

Our study aimed to assess the normal parameters of renal parenchyma and upper urinary tract from a contrast enhanced computed tomography assessment in order to create a mathematical model of normal kidney.

PATIENTS AND METHODS

We conducted a retrospective observation study on 520 patients with a normal abdominal contrast enhanced CT scan in our Institute during November 2008-November 2010. All CT examinations were performed using 16 slices Siemens Emotion 2007 (Siemens Medical Solutions, Malvern, PA, USA). Two experienced radiologists evaluated all the evaluations and reformatted axial sections and after excluding patients with urinary tract pathology, the images were transferred to a separate workstation (eFilm Workstation(TM) 2.2.1, Merge Healthcare, Milwaukee, USA). Parameters measured were: the number of kidneys, craniocaudal diameter (CCD) in a coronar reconstruction, transverse diameter (TD) and anteroposterior diameter (APD) as the maximum diameter of the kidneys in the axial sections, parenchymal (PW) and cortical width (CW) in axial sections, kidney pyelon width (KPW), parenchymal index (PI), kidney rotation, measured in relation to the sagittal axial plane of reference (AR) and rotation of the kidney measured in the sagittal plane in relation to the coronary reference (SR). To identify factors that can influence the variables CCD, CW and PW, multivariate regression models were performed using SPSS software (SPSS 15, SPSS Inc., Chicago, Illinois, USA). We considered p<0.05 statistically significant.

RESULTS

CCD remains high until the fifth decade of life (p=0.0053 on the right side, p=0.0012 on the left, ANOVA), PW values were found to be somewhat increased (p=0.0293 on the right side, p=0.2924 on the left, ANOVA). There are linear correlations between height and CCD, CW and PW, with statistical significance (p<0.05 each, Spearman ρ between 0.13 and 0.4). In multivariate analysis, only BMI, male gender and height had statistical significance.

CONCLUSIONS

There is a wide range in size kidney. Among factors that strongly influence the values of CCD, CW, and PW in adults, BMI, male gender and height are most important. Also, cranial and caudal position of the kidney influences renal size. As for the size of the renal cortex, the factor most influencing these values is the absence of a contralateral kidney.