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QR Challenge: RAD 122 Final Review

Created using the ClassTools QR Treasure Hunt Generator

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Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.

B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!

C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.

Questions / Answers (teacher reference)

Question

Answer

1. Imaging and archiving systems in Radiology communicate using a digital format called:DICOM
2. What is the term used to describe the volume elements (depth) within the matrix third direction (“Z” direction)?Voxel
3. For optimum spatial resolution, OID should be the:shortest possible
4. Random information within a diagnostic image that detracts from the overall image appearance is known as:noise
5. How many possible shades of grey tones are possible with one byte?256
6. Why would a institution consider off-site storage for images?Off-site storage is used to ensure data integrity if a catastrophic event were to occur
7. You are using a Phillip's PSP plate. The exposure indicator gives you the number 400. You had used 20 mAs, 80 kVp, and a 40 SID.If you were to repeat the exposure using 40 mAs, 80 kVp, and a 40 SID, the exposure indicator would now read:200
8. What step in digital image processing identifies the useful exposure values ("values of interest") in raw image data?Histogram Analysis
9. What is a list of the numerical values that make up the contrast for an image of a particular body part called?LUT
10. A cause of image blur common to both analog and digital imaging is:patient motion
11. Digital imaging systems have a large dynamic range, which means that they can respond to a wide range of:exposures
12. An imaging tool the radiographer should use to monitor plate exposure so that the patient is not overexposed during CR imaging is the:Exposure Index
13. If electrons that are trapped in the F-center or F-trap are not released after the "read" process, the result on the next image would be:image fog
14. Extreme overexposure to a DR detector can result indetector DEL saturation
15. In all systems, exposures outside the range indicate what?Both overexposure and underexposure
16. In a flat-panel imaging system, electrons are converted into digital values by a(n):ADC
17. What can we as technologist use to help eliminate scatter?We can select proper exposure techniques, such as a high kVp and low mAs. We can also use correct collimation and positioning. The use of grids also helps to control the amount of scatter that reaches the image receptor when the part thickness is larger than 10 cm or when using a kVp higher than 80.
18. The latent image on a CR plate will lose about 25% of its energy in:8hrs
19. If a projected image measures 3 in. and the magnification factor is 1.1, what is the size of the actual object?2.7
20. As mAs increases, the quantity of radiation reaching the IRincreases
21. If the intensity of a radiation source is 80 mR/hr at a distance of 4 m, the intensity at a distance of 6 m from the source would be what?35.55
22. A radiograph of the forearm is produced using 4 mA at 70 kVp. What kVp is required to halve the exposure?60
23. As OID increases and SID remains constant, entrance skin exposure does what?increases
24. If a person stands 14 feet from the source of exposure, receives an exposure of 65 mR, and then moves to 4 feet from the source of exposure, what would be the new exposure according to the inverse square law?796

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Imaging_and_archiving_systems_in_Radiology_communicate_using_a_digital_format_called:

Question 1 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_term_used_to_describe_the_volume_elements_(depth)_within_the_matrix_third_direction_(“Z”_direction)?

Question 2 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=For_optimum_spatial_resolution,_OID_should_be_the:

Question 3 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Random_information_within_a_diagnostic_image_that_detracts_from_the_overall_image_appearance_is_known_as:

Question 4 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=How_many_possible_shades_of_grey_tones_are_possible_with_one_byte?

Question 5 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Why_would_a_institution_consider_off-site_storage_for_images?

Question 6 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=You_are_using_a_Phillip's_PSP_plate._The_exposure_indicator_gives_you_the_number_400._You_had_used_20_mAs,_80_kVp,_and_a_40_SID.If_you_were_to_repeat_the_exposure_using_40_mAs,_80_kVp,_and_a_40_SID,_the_exposure_indicator_would_now_read:

Question 7 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_step_in_digital_image_processing_identifies_the_useful_exposure_values_("values_of_interest")_in_raw_image_data?

Question 8 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_a_list_of_the_numerical_values_that_make_up_the_contrast_for_an_image_of_a_particular_body_part_called?

Question 9 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_cause_of_image_blur_common_to_both_analog_and_digital_imaging_is:

Question 10 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Digital_imaging_systems_have_a_large_dynamic_range,_which_means_that_they_can_respond_to_a_wide_range_of:

Question 11 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=An_imaging_tool_the_radiographer_should_use_to_monitor_plate_exposure_so_that_the_patient_is_not_overexposed_during_CR_imaging_is_the:

Question 12 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_electrons_that_are_trapped_in_the_F-center_or_F-trap_are_not_released_after_the_"read"_process,_the_result_on_the_next_image_would_be:

Question 13 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=Extreme_overexposure_to_a_DR_detector_can_result_in

Question 14 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=In_all_systems,_exposures_outside_the_range_indicate_what?

Question 15 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=In_a_flat-panel_imaging_system,_electrons_are_converted_into_digital_values_by__a(n):

Question 16 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_can_we_as_technologist_use_to_help_eliminate_scatter?

Question 17 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_latent_image_on_a_CR_plate_will_lose_about_25%_of_its_energy_in:

Question 18 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_a_projected_image_measures_3_in._and_the_magnification_factor_is_1.1,_what_is_the_size_of_the_actual_object?

Question 19 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=As_mAs_increases,_the_quantity_of_radiation_reaching_the_IR

Question 20 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_the_intensity_of_a_radiation_source_is_80_mR/hr_at_a_distance_of_4_m,_the_intensity_at_a_distance_of_6_m_from_the_source_would_be_what?

Question 21 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_radiograph_of_the_forearm_is_produced_using_4_mA_at_70_kVp._What_kVp_is_required_to_halve_the_exposure?

Question 22 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=As_OID_increases_and_SID_remains_constant,_entrance_skin_exposure_does_what?

Question 23 (of 24)

 


RAD 122 Final Review: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_a_person_stands_14_feet_from_the_source_of_exposure,_receives_an_exposure_of_65_mR,_and_then_moves_to_4_feet_from_the_source_of_exposure,_what_would_be_the_new_exposure_according_to_the_inverse_square_law?

Question 24 (of 24)