#Sales Offer!| Get upto 25% Off:

January 26, 2021

Find the detector thicknesses for NaI(Tl) and BGO.

Both NaI(Tl) and BGO can be used as PET detectors. The linear attenuation coefficient of BGO at 511 keV is 0.964 cm⁻¹ as opposed to 0.343 cm⁻¹for NaI(Tl). BGO does not convert gamma ray photons to light photons as efficiently as NaI(Tl), and is in fact roughly 13% as efficient. In this problem, suppose two detectors are designed, one from NaI(Tl) and one from BGO. Assume both are designed to stop 75% of the 511 keV photons that strike the crystal.

(a) Find the detector thicknesses for NaI(Tl) and BGO.

(b) A light burst from NaI(Tl) has a higher intrinsic SNR than that from BGO. Find the ratio of intrinsic SNRs, NaI(Tl) to BGO.

Engineering

Share this :

Found something interesting ?

We don't just promise. Here is what we guarantee!

• On-time delivery guarantee
• PhD-level professional writers
• Free Plagiarism Report

• 100% money-back guarantee
• Absolute Privacy & Confidentiality
• High Quality custom-written papers

Related Model Questions

Feel free to peruse our college and university model questions. If any our our assignment tasks interests you, click to place your order. Every paper is written by our professional essay writers from scratch to avoid plagiarism. We guarantee highest quality of work besides delivering your paper on time.

This task will require you to identify a discipline / industry / organisation (referred to as the research field) and to investigate an aspect of their decision-making needs as well as the opportunities for computer-based decision support systems development. Generic examples of research fields you may wish to consider could be the health sciences and patient monitoring, or the agricultural sector and the need to predict certain farming operations, or the university as it supports the decisions of international students, or a company as it budgets finances. The texts by Sharda et al (2014), and Web sites dssresources.com http://businessintelligence.ittoolbox.com/ and Australian Information Industry Association http://www.aiia.com.au/ and others provide examples of software tools and research fields where computer-based decision support are being developed. Wikipedia and Google are also good starting points. If you are unable to make a selection, the teaching staff can assist. This first assignment broadly aligns with the intelligence and design phases of Simon’s (1977)[1] decision-making model. The outcome of this assignment will be a business report containing your proposal. For the next stage of the assignment, you will need to develop your proposal into a project prototype which is also an individual assignment. This second phase broadly corresponds with the choice and implementation decision-making phases (Simon 1977). The assessment overall is designed to enable students to develop analytical and inquiry skills, writing, oral and interpersonal communication skills, organisational abilities, a sense of professionalism, as well as acquiring an understanding of the topic

March 17, 2015 5:41 pm

Why is mercuric chloride fixative not widely used in histology laboratory? a)Causes shrinkage and is a slow fixative b)Causes mercuric chloride pigment c)Tissues fixed using mercury can only be demonstrated using an electron microscope d)Its explosive e)It can only be used to fix bones which will be de-calcified using x-ray technique

March 1, 2016 2:39 pm

Give a brief definition of the following terms as used in employee relations Employee relations (1 Mark) Industrial dispute (1 mark) Grievance (1 Mark) Collective bargaining (1 Mark) Trade union (1 mark)

April 26, 2016 6:49 pm