5 research outputs found
The MeerKAT international GHz tiered extragalactic exploration (MIGHTEE) survey
The MIGHTEE large survey project will survey four of the most well-studied extragalactic deep fields, totalling 20 square degrees to µJy sensitivity at Giga-Hertz frequencies, as well as an ultra-deep image of a single ∼1 deg2 MeerKAT pointing. The observations will provide radio continuum, spectral line and polarisation information. As such, MIGHTEE, along with the excellent multi-wavelength data already available in these deep fields, will allow a range of science to be achieved. Specifically, MIGHTEE is designed to significantly enhance our understanding of, (i) the evolution of AGN and star-formation activity over cosmic time, as a function of stellar mass and environment, free of dust obscuration; (ii) the evolution of neutral hydrogen in the Universe
and how this neutral gas eventually turns into stars after moving through the molecular phase, and how efficiently this can fuel AGN activity; (iii) the properties of cosmic magnetic fields and how they evolve in clusters, filaments and galaxies. MIGHTEE will reach similar depth to the planned SKA all-sky survey, and thus will provide a pilot to the cosmology experiments that will
be carried out by the SKA over a much larger survey volume
Evaluating the possible role of 68Ga-citrate PET/CT in the characterization of indeterminate lung lesions
We sought to determine whether PET/CT
imaging with 68Ga-citrate could be of value in distinguishing
benign from malignant lung pathology in a setting
with a high prevalence of granulomatous diseases.
METHODS : Thirty-six consecutive patients with indeterminate
lung lesions prospectively underwent dual time point
(60 and 120 min) 68Ga-citrate PET/CT study prior to lung
biopsy. Qualitative and semi-quantitative measures of tracer
uptake in the lung lesions (SUVmax) were compared to
the histopathology in order to establish an imaging pattern
to distinguish benign from malignant lesions. RESULTS : Fourteen patients (38.9 %) were diagnosed with a
malignant lesion, 12 (33.3 %) with tuberculosis (TB), and
10 participants (27.8 %) with other benign lung lesions. At
60-min post-injection, patients who were diagnosed with a
malignant lesion (n = 14) demonstrated a mean SUVmax
of 3.36 ± 1.14, with a median value of 3.04 (min = 1.56,
max = 4.65).Those with TB (n = 12) demonstrated a
SUVmax of 3.99 ± 2.28, and a median value of 3.71
(pct25 = 2.19, pct75 = 4.95). In patients with other benign
lesions (n = 10), the following values were observed: a
SUVmax of 2.70 ± 1.31, a median value of 2.50
(pct25 = 1.76, pct75 = 3.59). The mean values of these
three types of pathology were not statistically significant
(p = 0.1919), and therefore the SUVmax could not be used
to accurately distinguish between these lesions using both
early and delayed imaging.
CONCLUSION : This study, as the first 68Ga-citrate PET/CT
in humans for the in vivo imaging of lung pathology,
demonstrated its potential for the detection of both
malignancy and TB. However, 68Ga-citrate seemed incapable
of providing a clear distinction between malignant
and benign lung lesions in a setting with a high prevalence
of granulomatous diseases such as TB.http://link.springer.com/journal/12149hb201
The MeerKAT International GHz tiered Extragalactic Exploration (MIGHTEE) survey
The MIGHTEE large survey project will survey four of the most well-studied extragalactic deep fields, totalling 20 square degrees to Jy sensitivity at Giga-Hertz frequencies, as well as an ultra-deep image of a single ~1 square degree MeerKAT pointing. The observations will provide radio continuum, spectral line and polarisation information. As such, MIGHTEE, along with the excellent multi-wavelength data already available in these deep fields, will allow a range of science to be achieved. Specifically, MIGHTEE is designed to significantly enhance our understanding of, (i) the evolution of AGN and star-formation activity over cosmic time, as a function of stellar mass and environment, free of dust obscuration; (ii) the evolution of neutral hydrogen in the Universe and how this neutral gas eventually turns into stars after moving through the molecular phase, and how efficiently this can fuel AGN activity; (iii) the properties of cosmic magnetic fields and how they evolve in clusters, filaments and galaxies. MIGHTEE will reach similar depth to the planned SKA all-sky survey, and thus will provide a pilot to the cosmology experiments that will be carried out by the SKA over a much larger survey volume
The MeerKAT international GHz tiered extragalactic exploration (MIGHTEE) survey
© Copyright owned by the author(s). The MIGHTEE large survey project will survey four of the most well-studied extragalactic deep fields, totalling 20 square degrees to µJy sensitivity at Giga-Hertz frequencies, as well as an ultra-deep image of a single ~1 deg2 MeerKAT pointing. The observations will provide radio continuum, spectral line and polarisation information. As such, MIGHTEE, along with the excellent multi-wavelength data already available in these deep fields, will allow a range of science to be achieved. Specifically, MIGHTEE is designed to significantly enhance our understanding of, (i) the evolution of AGN and star-formation activity over cosmic time, as a function of stellar mass and environment, free of dust obscuration; (ii) the evolution of neutral hydrogen in the Universe and how this neutral gas eventually turns into stars after moving through the molecular phase, and how efficiently this can fuel AGN activity; (iii) the properties of cosmic magnetic fields and how they evolve in clusters, filaments and galaxies. MIGHTEE will reach similar depth to the planned SKA all-sky survey, and thus will provide a pilot to the cosmology experiments that will be carried out by the SKA over a much larger survey volume