An axis of rotation alignment system for high-resolution pinhole SPECT imaging

2008 ◽  
Vol 589 (2) ◽  
pp. 338-344 ◽  
Author(s):  
Joong Hyun Kim ◽  
Jae Sung Lee ◽  
Min Jae Park ◽  
Won Woo Lee ◽  
Soo Mee Kim ◽  
...  
Keyword(s):  
High Resolution ◽  
Spect Imaging ◽  
Pinhole Spect ◽  
Axis Of Rotation ◽  
Alignment System

High Resolution ${}^{125}$I Pinhole SPECT Imaging of the Mouse Thyroid With the MediSPECT Small Animal CdTe Scanner

2010 ◽  
Vol 57 (3) ◽  
pp. 1029-1037 ◽  
Author(s):  
Giovanni Mettivier ◽  
Maria Cristina Montesi ◽  
Assunta Simona Curion ◽  
Adele Lauria ◽  
Marcello Marotta ◽  
...  
Keyword(s):  
High Resolution ◽  
Small Animal ◽  
Spect Imaging ◽  
Pinhole Spect ◽  
Mouse Thyroid

On-line alignment and astigmatism correction using a TV and personal computer

1993 ◽  
Vol 51 ◽  
pp. 202-203
Author(s):  
F. Hosokawa ◽  
Y. Kondo ◽  
T. Honda ◽  
Y. Ishida ◽  
M. Kersker
Keyword(s):  
High Resolution ◽  
Personal Computer ◽  
Block Diagram ◽  
Incident Beam ◽  
Ccd Camera ◽  
Alignment Procedure ◽  
Astigmatism Correction ◽  
Transmission Electron ◽  
Alignment System ◽  
On Line

High-resolution transmission electron microscopy must attain utmost accuracy in the alignment of incident beam direction and in astigmatism correction, and that, in the shortest possible time. As a method to eliminate this troublesome work, an automatic alignment system using the Slow-Scan CCD camera has been introduced recently. In this method, diffractograms of amorphous images are calculated and analyzed to detect misalignment and astigmatism automatically. In the present study, we also examined diffractogram analysis using a personal computer and digitized TV images, and found that TV images provided enough quality for the on-line alignment procedure of high-resolution work in TEM. Fig. 1 shows a block diagram of our system. The averaged image is digitized by a TV board and is transported to a computer memory, then a diffractogram is calculated using an FFT board, and the feedback parameters which are determined by diffractogram analysis are sent to the microscope(JEM- 2010) through the RS232C interface. The on-line correction system has the following three modes.

scholarly journals A high-resolution solar spectrum 2000 Å–2200 Å

1970 ◽  
Vol 36 ◽  
pp. 271-273
Author(s):  
B. B. Jones ◽  
B. C. Boland ◽  
R. Wilson ◽  
S. T. F. Engstrom
Keyword(s):  
High Resolution ◽  
Solar Spectrum ◽  
Solar Image ◽  
Roll Control ◽  
North East ◽  
The North ◽  
Alignment System ◽  
Optical Alignment ◽  
South Axis ◽  
System Operating

A high-resolution solar spectrum in the range 2000–2200 Å was obtained in a recent flight of a sunpointing Skylark rocket. This was launched at 04.21 hr UT on April 22, 1969 from Woomera and reached an apogee of 178 km. An optical alignment system operating on the main vehicle pointing system gave a net stabilisation of ±3 arc sec in the position of the solar image relative to the spectrograph slit. The slit, of length 1.0 mm, was set in the north-east quadrant parallel to and 5 arc min from the north/south axis, its lower edge being 1 arc min from the equator. The roll control of ±2.5° was provided entirely by the standard Elliott Bros. type of vehicle stabilisation.

scholarly journals Longitudinal in vivo evaluation of bone regeneration by combined measurement of multi-pinhole SPECT and micro-CT for tissue engineering

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Philipp S. Lienemann ◽  
Stéphanie Metzger ◽  
Anna-Sofia Kiveliö ◽  
Alain Blanc ◽  
Panagiota Papageorgiou ◽  
...  
Keyword(s):  
Computed Tomography ◽  
High Resolution ◽  
Bone Formation ◽  
Bone Regeneration ◽  
Bone Defects ◽  
Histological Evaluation ◽  
Biological Processes ◽  
Micro Ct ◽  
Pinhole Spect

Abstract Over the last decades, great strides were made in the development of novel implants for the treatment of bone defects. The increasing versatility and complexity of these implant designs request for concurrent advances in means to assess in vivo the course of induced bone formation in preclinical models. Since its discovery, micro-computed tomography (micro-CT) has excelled as powerful high-resolution technique for non-invasive assessment of newly formed bone tissue. However, micro-CT fails to provide spatiotemporal information on biological processes ongoing during bone regeneration. Conversely, due to the versatile applicability and cost-effectiveness, single photon emission computed tomography (SPECT) would be an ideal technique for assessing such biological processes with high sensitivity and for nuclear imaging comparably high resolution (<1 mm). Herein, we employ modular designed poly(ethylene glycol)-based hydrogels that release bone morphogenetic protein to guide the healing of critical sized calvarial bone defects. By combined in vivo longitudinal multi-pinhole SPECT and micro-CT evaluations we determine the spatiotemporal course of bone formation and remodeling within this synthetic hydrogel implant. End point evaluations by high resolution micro-CT and histological evaluation confirm the value of this approach to follow and optimize bone-inducing biomaterials.

Constrained least squares filtering in high resolution PET and SPECT imaging

1990 ◽  
Vol 37 (2) ◽  
pp. 647-651 ◽  
Author(s):  
G.D. Hutchins ◽  
W.L. Rogers ◽  
P. Chiao ◽  
R.R. Raylman ◽  
B.W. Murphy
Keyword(s):  
High Resolution ◽  
Least Squares ◽  
Spect Imaging ◽  
Constrained Least Squares

scholarly journals Movies of dopamine transporter occupancy with ultra-high resolution focusing pinhole SPECT

2007 ◽  
Vol 12 (11) ◽  
pp. 984-987 ◽  
Author(s):  
B Vastenhouw ◽  
F van der Have ◽  
A J A van der Linden ◽  
L von Oerthel ◽  
J Booij ◽  
...  
Keyword(s):  
High Resolution ◽  
Dopamine Transporter ◽  
Pinhole Spect

Ultra high resolution pinhole SPECT for small animal study

1998 ◽  
Vol 45 (6) ◽  
pp. 3122-3126 ◽  
Author(s):  
K. Ogawa ◽  
T. Kawade ◽  
K. Nakamura ◽  
A. Kubo ◽  
T. Ichihara
Keyword(s):  
High Resolution ◽  
Animal Study ◽  
Small Animal ◽  
Pinhole Spect ◽  
Small Animal Study
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