Search Results - "Grootoonk, S"

Characterization and Correction of Interpolation Effects in the Realignment of fMRI Time Series by Grootoonk, S., Hutton, C., Ashburner, J., Howseman, A.M., Josephs, O., Rees, G., Friston, K.J., Turner, R.

“…Subject motion in functional magnetic resonance imaging (fMRI) studies can be accurately estimated using realignment algorithms. However, residual changes in…”
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Correction for scatter in 3D brain PET using a dual energy window method by Grootoonk, S, Spinks, T J, Sashin, D, Spyrou, N M, Jones, T

“…A method for scatter correction using dual energy window acquisition has been developed and implemented on data collected with a brain-PET tomograph operated…”
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Physical performance of a positron tomograph for brain imaging with retractable septa by Spinks, T J, Jones, T, Bailey, D L, Townsend, D W, Grootoonk, S, Bloomfield, P M, Gilardi, M C, Casey, M E, Sipe, B, Reed, J

“…Performance characteristics of a new design of positron tomograph with automatically retractable septa for brain imaging have been studied. The device,…”
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Regional cerebral blood flow during volitional expiration in man: a comparison with volitional inspiration by Ramsay, S C, Adams, L, Murphy, K, Corfield, D R, Grootoonk, S, Bailey, D L, Frackowiak, R S, Guz, A

“…1. Positron emission tomographic (PET) imaging of regional cerebral blood flow (rCBF), using a new 3-dimensional technique of data collection, was used to…”
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An investigation of factors affecting detector and geometric correction in normalization of 3-D PET data by Bailey, D.L., Townsend, D.W., Kinahan, P.E., Grootoonk, S., Jones, T.

“…Normalization in three-dimensional (3-D) positron emission tomography (PET) comprises two aspects: correction for differential detector response and correction…”
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A Rotating PET Scanner Using BGO Block Detectors: Design, Performance and Applications by Townsend, David W, Wensveen, Martin, Byars, Larry G, Geissbuhler, Antoine, Tochon-Danguy, Henri J, Christin, Anne, Defrise, Michel, Bailey, Dale L, Grootoonk, Sylke, Donath, Alfred, Nutt, Ronald

“…Recent advances in fully three-dimensional reconstruction for multi-ring PET scanners have led us to explore the potential of a prototype scanner based on the…”
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Assessment of response function in two PET scanners with and without interplane septa by Michel, C., Bol, A., Spinks, T., Townsend, D., Bailey, D., Grootoonk, S., Jones, T.

“…The authors have assessed the response function both experimentally and theoretically for two commercial tomographs: CTI 931/08-12 and CTI 953B with and…”
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The development of in vivo tracer methods to obtain new information about human disease: a study of the hallucinating brain by Jones, T, Silbersweig, D A, Stern, E, Schnorr, L, Seaward, J, Clark, J C, Lammertsma, A A, Grootoonk, S

“…An outline is provided of the development of methodological strategies to address the question of focal cerebral activation during hallucinations in…”
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A functional neuroanatomy of hallucinations in schizophrenia by Silbersweig, D. A, Stern, E, Frith, C, Cahill, C, Holmes, A, Grootoonk, Sylke, Seaward, J, McKenna, P, Chua, S. E, Schnorr, L, Jones, T, Frackowiak, R. S. J

“…Hallucinations, perceptions in the absence of external stimuli, are prominent among the core symptoms of schizophrenia. The neural correlates of these brief,…”
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P46 Radiation exposure of technical staff operating mobile PET/CT scanners by Alsafi, K., Grootoonk, S., Roberts, F., Spyrou, N.

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Short-term effects of oral theophylline in addition to CPAP in mild to moderate OSAS by Orth, Maritta M., Grootoonk, Sandra, Duchna, Hans-Werner, de Zeeuw, Justus, Walther, Jörg W., Bauer, Torsten T., Schultze-Werninghaus, Gerhard, Rasche, Kurt

“…Theophylline is effective in the treatment of central apneas and periodic breathing. In obstructive sleep apnea syndrome (OSAS), results of pharmacological…”
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SUV correction for partial volume by CT measured lesion size by Irwin, A.G., Cook, G., Roberts, F., Grootoonk, S.

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Clinical audit to assess the impact of PET/CT on patient management in the UK by Georgiadi, E., Spyrou, N.M., Grootoonk, S., Cook, G.

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Integration of combined PET/CT images with conformal radiation treatment planning by Takhar, P.S., Spyrou, N.M., Grootoonk, S., Newbold, K., Cook, G.

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A comparison of 3D scatter correction methods in a neuroPET tomograph by Spinks, T.J., Grootoonk, S., Bailey, D.L., Schnorr, L.

“…A comparison has been made between two procedures for scatter correction of 3D PET data acquired on a brain scanner (CTI/Siemens 953B). The methods are (i)…”
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P33 ESTABLISHING LOCAL PROVISION OF PET/CT SERVICE IN THE SUSSEX CANCER NETWORK by Dizdarevic, S., Miles, K.A., Dodge, G., Garvican, L., Sallomi, D., Georgiou, F., Marchbank, N., Sparks, S., Piper, J., Grootoonk, S.

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Performance evaluation of the positron scanner ECAT EXACT by Wienhard, K, Eriksson, L, Grootoonk, S, Casey, M, Pietrzyk, U, Heiss, W D

“…The Cologne Special is a prototype of the ECAT EXACT (model 921), a new generation of Siemens-CTI PET scanners. It consists of three rings of 48 BGO block…”
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Correction for scatter using a dual energy window technique with a tomograph operated without septa by Grootoonk, S., Spinks, T.J., Jones, T., Michel, C., Bol, A.

“…A method of scatter correction using dual energy window acquisition was studied on a Siemens/CTI 953B brain scanner operated without septa. The basis of the…”
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The Effect of Slice Order and Thickness on fMRI Activation Data Using Multislice Echo-Planar Imaging by Howseman, Alistair M., Grootoonk, Sylke, Porter, David A., Ramdeen, Joann, Holmes, Andrew P., Turner, Robert

“…Multislice echo-planar imaging (EPI) is a commonly used technique for fMRI studies. Brain activation images acquired using fMRI are sensitive to T2* changes,…”
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Impact of a neuro-insert on brain scanning with the ECAT EXACT HR+ PET scanner by Grootoonk, S., Fink, G., Brun, T.

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