Publications by authors named "Kellner D"

Background: Misalignment or double-contouring artifacts can appear in high-resolution 3D cone beam computed tomography (CBCT) images, potentially indicating geometric accuracy issues in the projection data. Such artifacts may go unnoticed in low-resolution images and could be associated with changes in the focal spot (FS) position.

Purpose: High-resolution 3D-CBCT imaging by a mobile imaging device with a large gantry clearance offers more versatility for clinical workflows in image-guided brachytherapy (IGBT), intraoperative radiation therapy (IORT), and spinal, as well as maxillofacial surgery.

View Article and Find Full Text PDF
Article Synopsis
  • Osteitis pubis is a rare inflammation of the pubic symphysis that has been previously linked to various urological procedures, but not to holmium laser enucleation of the prostate (HoLEP).
  • A specific patient developed osteitis pubis several weeks after undergoing HoLEP, presenting with groin pain and difficulty walking, which was confirmed via MRI.
  • Treatment was conservative, involving the use of a Foley catheter, oral antibiotics, and regular monitoring, leading to complete resolution of symptoms by nine months post-surgery.
View Article and Find Full Text PDF

Managing an extreme event like a healthcare disaster requires accurate information about the event's circumstances to comprehend the full consequences of acting. However, information quality is rarely optimal since it takes time to determine the information of relevance. The COVID-19 pandemic showed that even official data sources are far from optimal since they suffer from reporting delays that slow decision-making.

View Article and Find Full Text PDF

Background: Kikuchi-Fujimoto disease (KFD) is a rare cause of rapidly evolving tender cervical lymphadenopathy. It is often initially misdiagnosed and managed as infectious lymphadenitis. Although most cases of KFD are self-limited and improve with antipyretics and analgesics, some are more refractory and may require corticosteroids or hydroxychloroquine therapy.

View Article and Find Full Text PDF

Objective: To evaluate perioperative outcomes related to sexual and urinary function in patients who underwent a holmium laser enucleation of the prostate (HoLEP) with selective laser enucleation of the median lobe.

Materials And Methods: We retrospectively reviewed the first 450 HoLEP cases by a single surgeon from April 2019 to March 2022. Fifty-five patients with intravesical-prostatic protrusion or high bladder neck without obstructing lateral lobes underwent selective enucleation of the median lobe of the prostate.

View Article and Find Full Text PDF

Purpose Of Review: To provide an overview of how surgical benign prostatic hyperplasia (BPH) procedures are compensated in the United States and the implications of the current reimbursement system on the care of patients.

Recent Findings: The resource-based relative value care system is Medicare's current reimbursement model. There is strong evidence that the current system does not adequately account for complex care.

View Article and Find Full Text PDF

Objective: To compare operative efficiency of Holmium laser enucleation of the prostate (HoLEP) using both the standard multi-incisional approach and en-bloc enucleation with early apical release during the initial learning curve.

Materials And Methods: We retrospectively reviewed the initial 95 consecutive men who underwent HoLEP between April 2019 and September 2020 by a single surgeon. We compared patient demographics, and pre-, intra-, and post-operative metrics between both groups.

View Article and Find Full Text PDF

Prostate artery embolization (PAE) has been shown to be safe and effective at treating lower urinary tract symptoms (LUTS), urinary retention, and hematuria caused by benign prostatic hyperplasia (BPH). To distinguish from other causes of these symptoms, a multidisciplinary evaluation by a urologist and interventional radiologist should include a complete history to screen for any nonprostate causes of LUTS. The International Prostate Symptom Score is a useful objective measure to quantify the patient's urinary complaints.

View Article and Find Full Text PDF

The yellow fever mosquito (Aedes aegypti), is the primary vector of dengue, Zika, and chikungunya fever, among other arboviral diseases. It is also a popular laboratory model in vector biology due to its ease of rearing and manipulation in the lab. Established laboratory strains have been used worldwide in thousands of studies for decades.

View Article and Find Full Text PDF

Background: Racial inequities for patients with heart failure (HF) have been widely documented. HF patients who receive cardiology care during a hospital admission have better outcomes. It is unknown whether there are differences in admission to a cardiology or general medicine service by race.

View Article and Find Full Text PDF

Members of the family of nuclear factor κB (NF-κB) transcription factors are critical for multiple cellular processes, including regulating innate and adaptive immune responses, cell proliferation, and cell survival. Canonical NF-κB complexes are retained in the cytoplasm by the inhibitory protein IκBα, whereas noncanonical NF-κB complexes are retained by p100. Although activation of canonical NF-κB signaling through the IκBα kinase complex is well studied, few regulators of the NF-κB-inducing kinase (NIK)-dependent processing of noncanonical p100 to p52 and the subsequent nuclear translocation of p52 have been identified.

View Article and Find Full Text PDF

Study Objective: The aim of this study is to provide a contemporary medicolegal analysis of claims brought against anesthesiologists in the United States for events occurring in the post-anesthesia care unit (PACU).

Design: In this retrospective analysis, we analyzed closed claims data from the Controlled Risk Insurance Company (CRICO) Comparative Benchmarking System (CBS) database.

Setting: Claims closed between January 1, 2010 and December 31, 2014 were included for analysis if the alleged damaging event occurred in a PACU and anesthesiology was named as the primary responsible service.

View Article and Find Full Text PDF

Background: To date, patients with glioblastoma still have a bad median overall survival rate despite radiation dose-escalation and combined modality treatment. Neurocognitive decline is a crucial adverse event which may be linked to high doses to the cortex. In a planning study, we investigated the impact of dose constraints to the cerebral cortex and its relation to the organs at risk for glioblastoma patients.

View Article and Find Full Text PDF

Background: This study aims to explore the efficacy of tumor-infiltrating lymphocytes (TIL) along with interferon- (IFN-) to treat stage III malignant melanoma (MM) patients in China.

Methods: Between May 2010 and October 2014, 77 patients of stage III MM who underwent surgery were collected in this study. These patients were divided into two groups: patients who received TIL + IFN- ± RetroNectin-activated cytokine-induced killer cells (R-CIK) in Arm 1 ( = 27) and IFN- ± R-CIK in Arm 2 ( = 50) as adjuvant therapy.

View Article and Find Full Text PDF

The palladium-catalyzed dimerization of isoprene is a practical approach of synthesizing monoterpenes. Though several highly selective methods have been reported, most of them still required pressure or costly ligands for attaining the active system and desired selectivity. Herein, we present a simple and economical procedure towards the tail-to-tail dimer using readily available Pd(OAc) and inexpensive triphenylphosphine as ligand.

View Article and Find Full Text PDF

Neuromyelitis optica (NMO) is an inflammatory disorder mediated by antibodies to aquaporin-4 (AQP4) with prominent blood-brain barrier (BBB) breakdown in the acute phase of the disease. Anti-AQP4 antibodies are produced mainly in the periphery, yet they target the astrocyte perivascular end feet behind the BBB. We reasoned that an endothelial cell-targeted autoantibody might promote BBB transit of AQP4 antibodies and facilitate NMO attacks.

View Article and Find Full Text PDF

Sleep is an ancient animal behavior that is regulated similarly in species ranging from flies to humans. Various genes that regulate sleep have been identified in invertebrates, but whether the functions of these genes are conserved in mammals remains poorly explored. Drosophila insomniac (inc) mutants exhibit severely shortened and fragmented sleep.

View Article and Find Full Text PDF

Purpose: Couch-mounted cone-beam computed tomography (CBCT) imaging devices with independently rotatable x-ray source and flat-panel detector arms for acquisitions of arbitrary regions of interest (ROI) have recently been introduced in image-guided radiotherapy (IGRT). This work analyzes mechanical limitations and gravity-induced effects influencing the geometric accuracy of images acquired with arbitrary angular constellations of source and detector in nonisocentric trajectories, which is considered essential for IGRT. In order to compensate for geometric inaccuracies of this modality, a 9-degrees-of-freedom (9-DOF) flexmap correction approach is presented, focusing especially on the separability of the flexmap parameters of the independently movable components of the device.

View Article and Find Full Text PDF

Image guidance during highly conformal radiotherapy requires accurate geometric calibration of the moving components of the imager. Due to limited manufacturing accuracy and gravity-induced flex, an x-ray imager's deviation from the nominal geometrical definition has to be corrected for. For this purpose a ball bearing phantom applicable for nine degrees of freedom (9-DOF) calibration of a novel cone-beam computed tomography (CBCT) scanner was designed and validated.

View Article and Find Full Text PDF
Article Synopsis
  • The study proposes a straightforward method for calibrating and validating kilo-voltage cone-beam CT (kV CBCT) models using experimental data.
  • Calibration involves a two-step process examining both the source (photon energy spectrum) and the detector (pixel intensity based on photon energy).
  • The results show that the method yields high accuracy, with average deviations from experimental data of less than 1.5% for the sources and 4% for energy deposition in detectors across three different kV CBCT systems.
View Article and Find Full Text PDF

The present study aimed to investigate the efficacy of RetroNectin-activated cytokine-induced killer cell (R-CIK) therapy in advanced hepatocellular carcinoma patients as compared with conventional chemotherapy, a comparison that has not yet been thoroughly studied. From January 2010 to October 2013, 74 patients with an initial diagnosis of advanced hepatocelluar carcinoma were enrolled in the study. Patients were assigned to one of two treatment arms: patients in arm 1 (n=37) received R-CIK treatment as the first line therapy, whereas those in arm 2 (n=37) received chemotherapy as the first line treatment.

View Article and Find Full Text PDF

The mosquito Stegomyia aegypti (= Aedes aegypti) (Diptera: Culicidae) is the primary vector of viruses that cause yellow fever, dengue and Chikungunya fever. In the absence of effective vaccines, the reduction of these diseases relies on vector control strategies. The success of these strategies is tightly linked to the population dynamics of target populations.

View Article and Find Full Text PDF

Currently, metastatic pancreatic cancer is associated with disappointing survival outcomes. This is largely due to a rapid progression of the disease and a precipitous deterioration in the health of affected individuals, especially elderly patients who are often unable to tolerate chemotherapy. The aim of this study was to evaluate the efficacy and safety of adoptive immunotherapy using cytokine-induced killer cells (CIK) as a first-line treatment for metastatic pancreatic cancer.

View Article and Find Full Text PDF