Non-mass enhancement breast lesions: MRI findings and associations with malignancy.

Background: Magnetic resonance imaging (MRI) is a multi-sequence imaging technique. Although MRI is the most sensitive method for detecting breast cancer, it is limited in evaluating the malignant possibility of non-mass enhanced (NME) breast lesions. It is also rarely reported whether MRI can further indicate the invasion of the lesions.

Decoupled identification and compensation of nonlinear hysteresis cascading with linear dynamic in a moving magnet voice coil actuator.

The moving magnet voice coil actuator (MMVCA) is a promising choice for the long stroke nanopositioning stage with the advantage of low moving mass. However, the hysteresis observed in MMVCA limits further improvement on tracking performance. The hysteresis is cascading with the linear dynamic of the positioning stage, which makes common hysteresis identification inapplicable.

Using imaging to diagnose lipomatous ganglioneuroma: a case report and literature review.

We report a case of a well-defined lesion in an asymptomatic patient with lipomatous ganglioneuroma (LG) located close to the left thoracic spine. Its intensity was heterogeneous with adipocytes. The lesion extended into the spinal canal through the enlarged left intervertebral without bony erosion.

MRI-based Bosniak Classification of Cystic Renal Masses, Version 2019: Interobserver Agreement, Impact of Readers' Experience, and Diagnostic Performance.

Background The 2019 Bosniak classification (version 2019) of cystic renal masses (CRMs) provides a systematic update to the currently used 2005 Bosniak classification (version 2005). Further validation is required before widespread application. Purpose To evaluate the interobserver agreement of MRI criteria, the impact of readers' experience, and the diagnostic performance between version 2019 and version 2005.

A survey on design of reaction spheres and associated speed and orientation measurement technologies.

With the rapid development of micro-spacecraft, miniaturization has become a key problem in attitude control. As an angular momentum exchange actuator, a single reaction sphere can generate multi-DOF output torques and satisfy the requirement of three-axis attitude control. This enables it to be a potential alternative for micro-spacecraft attitude control system.

The design and kinetostatic modeling of 3PPR planar compliant parallel mechanism based on compliance matrix method.

Compliant Parallel Mechanisms (CPMs) are widely used in micro/nano-positioning systems. In recent years, CPMs with a large travel range (≥1 mm) have been getting increasing attention. In this paper, a 3 Prismatic-Prismatic-Revolute (3PPR) planar CPM with a motion range of 5 mm × 5 mm × 5° is designed.

Enhanced sensitivity shaping by data-based tuning of disturbance observer with non-binomial filter.

This work presents a new method of sensitivity shaping for motion control systems with disturbance observer (DOB). Although the traditional DOB design has been proved to be an effective means of rejecting disturbances in many applications, shaping of the closed-loop sensitivity is constrained since the Q-filter in DOB is usually restricted to a standard Butterworth or binomial form, where the cutoff frequency is the only tunable parameter. To overcome this limitation and achieve better performance for more demanding motion systems, a general form of the Q-filter is employed in this work.

A novel constrained H optimization algorithm for mechatronics design in flexure-linked biaxial gantry.

The biaxial gantry is widely used in many industrial processes that require high precision Cartesian motion. The conventional rigid-link version suffers from breaking down of joints if any de-synchronization between the two carriages occurs. To prevent above potential risk, a flexure-linked biaxial gantry is designed to allow a small rotation angle of the cross-arm.

SVD-based Preisach hysteresis identification and composite control of piezo actuators.

In this paper, the singular value decomposition (SVD) based identification and compensation of the hysteretic phenomenon in piezo actuators are addressed using a Preisach model. First, this paper presents an SVD-based least squares algorithm and a revision approach of the identification through updating the SVD. With the identified parameters and a log of the memory curve, a Preisach-based inversion compensator is constructed which is complemented with a feedback controller to address the inevitable and residual modeling errors.

[Relationship between beta amyloid protein 1-40 and post-operative delirium after oral and maxillofacial surgery in elderly patients].

Objective: To determine the incidence of post-operative delirium after oral and maxillofacial surgery under general anesthesia in elderly patients, and to examine its association with plasma concentrations of beta amyloid protein 1-40 (Abeta1-40).

Methods: Fifty patients underwent elective oral and maxillofacial surgery were divided into two groups: Group C (n=20) aged from 20 to 60 years old, and Group T (n=30) aged from 62 to 78 years old. The two group received the same general anesthesia.

[Influence of propofol and isoflurane on cytokines response to cancer surgery during perioperative period].

Objective: To compare the influence of propofol and isoflurane on pro-inflammatory and anti-inflammatory cytokine response to perioperative period of tongue cancer surgery.

Methods: Twenty-four adult patients undergone the operation of tongue cancer were assigned to two groups randomly, propofol group (Group P) and isoflurane group (Group I). In group P, anesthesia was induced with fentanyl 2-3 microg/kg, propofol 2 mg/kg, atracurium 0.