Results 91 to 100 of about 5,652,430 (282)

Radiation dose associated with common computed tomography examination

The Egyptian Journal of Radiology and Nuclear Medicine, 2017
Objective: To survey computed tomography (CT) radiation dose associated with non-contrast spiral Multislice CT examination in our institute. Methods: Detailed parameters for 362 consecutive examinations, including the patient weight, height, volume CT ...
Ayman Mokhtar, Mohamed Elawdy, Maysa Abd El-Hamid, Huda Refaie, Tarek A. El-Diasty, Sabry El Mogy   +5 more
doaj   +1 more source

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

FEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez, Diana Ascencio, Miguel Vallebueno‐Estrada, Eduardo González‐Orozco, Christian Eduardo Martínez‐Guerrero, Rafael Montiel, Alexander DeLuna   +6 more
wiley   +1 more source

Characteristics of the elderly in high - resolution computed tomography lung densitometry [PDF]

, 2004
To determine the characteristics of the elderly in high - resolution computed tomography (HRCT) lung densitometry, mean lung density (MLD) and relative area of the lungs showing attenuation values less than -950 HU (RA(950)) on HRCT were evaluated in ...
Hosaki, Yasuhiro, Tanizaki, Yoshiro, Ashida, Kozo, Fujii, Makoto, Iwagaki, Naofumi, Nagata, Takuya, Takata, Shingo, Yokoi, Tadashi, Mitsunobu, Fumihiro, Hamada, Masanori   +9 more
core   +1 more source

Assessment of regional pediatric computed tomography dose indices in Tamil Nadu

Journal of Medical Physics, 2017
The aim of this article is to assess Tamil Nadu pediatric computed tomography (CT) diagnostic reference levels (DRLs) by collecting radiation dose data for the most commonly performed CT examinations.
A Saravanakumar, K Vaideki, K N Govindarajan, S Jayakumar, B Devanand   +4 more
doaj   +1 more source

Computed Tomography Dose Index measurements using Gafchromic film XR-QA2

Asian Medical Journal and Alternative Medicine, 2016
Introduction:  Radiochromic (Gafchromic) film has been used in a range of dosimetry applications. Gafchromic film XR-QA2 (International specialty products, Wayne, NJ) has an operational dose response range up to 200 mGy in the energy range between 20 kVp and 200 kVp. This film has become increasingly popular for measuring CT dose distributions. Method:
Supawitoo Sookpeng, Patsuree Cheebsumon, Thanyawee Pengpan   +2 more
openaire   +1 more source

GelMA‐based 3D spheroids recapitulate transcriptomic and functional hallmarks of myeloid sarcoma

FEBS Open Bio, EarlyView.
GelMA 5% hydrogels support the formation of myeloid leukemia spheroids that recapitulate MS‐specific features, including G1 arrest, apoptosis, and ECM‐driven transcriptomic reprogramming. The 3D model mimicked soft‐tissue‐like stiffness and oxygen conditions, and transcriptomic convergence with primary MS samples confirmed its utility as a preclinical ...
Nicolas Germain, Elise Buret, Le Hoang Thanh Nguyen, Marion Cocheteux, Nicolas Touya, Mélanie Dhayer, Romain Dubois, Frank Lafont, Sebastien Janel, Patrice Maboudou, Steve Lancel, Philippe Marchetti   +11 more
wiley   +1 more source

Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank

FEBS Open Bio, EarlyView.
Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer, Pawel Rubach, Zbigniew Dauter, Wojciech Dec, Dariusz Brzezinski, Marta Kulik, Wladek Minor, Mariusz Jaskolski   +7 more
wiley   +1 more source

Use of radiobiological modeling in treatment plan evaluation and optimization of prostate cancer radiotherapy [PDF]

, 2011
There are many tools available that are used to evaluate a radiotherapy treatment plan, such as isodose distribution charts, dose volume histograms (DVH), maximum, minimum and mean doses of the dose distributions as well as DVH point dose constraints ...
Baltas, Dimos, Bengt K., Nikos Papanikolaou, Lind, Bengt K., Mavroidis, Panayiotis, Papanikolaou, Nikos, Bengt K. Lind, Panayiotis Mavroidis, Dimos Baltas   +8 more
core   +1 more source

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

Aging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

Diagnóstico de reabsorção radicular por meio de tomografia computadorizada de feixe cônico: uma revisão da literatura [PDF]

, 2013
TCC (graduação) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Curso de OdontologiaA perda da integridade do pré-cemento ou da pré-dentina torna o tecido mineralizado susceptível à ação das células clásticas, o que pode acarretar ...
Costa, Danielle Flor da
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