Echocardiogram Data Structures and Algorithms 5

Question 1

Which tree traversal order visits nodes in ascending sorted order when applied to a binary search tree indexing echocardiographic study timestamps?

Accepted Answer

In-order (left, root, right)

Answer

In-order traversal of a binary search tree visits nodes from smallest to largest key, producing timestamps in chronological ascending order.

Question 2

A cardiac segmentation pipeline uses memoization to avoid recomputing contour fitting for image patches already processed. This technique primarily trades:

Accepted Answer

Increased memory usage for reduced redundant computation

Answer

Memoization caches previously computed results in memory so they are not recalculated, exchanging additional memory consumption for faster execution.

Question 3

Fast Fourier Transform (FFT) is used in echocardiography to convert tissue Doppler time-domain signals to frequency-domain spectra. Compared to the naive DFT, FFT reduces complexity from O(n²) to:

Accepted Answer

O(n log n)

Answer

The FFT algorithm exploits symmetry to reduce the discrete Fourier transform from O(n²) to O(n log n) operations.

Question 4

An echo system parses nested XML DICOM Structured Reports where each node may have child nodes. Which data structure naturally models this hierarchical, nested relationship?

Accepted Answer

Tree

Answer

Trees model hierarchical parent-child relationships directly; each XML element is a node whose nested child elements are its subtree.

Question 5

When two echocardiography databases are merged and duplicate patient records must be identified efficiently across millions of entries, which algorithmic technique scales best?

Accepted Answer

Hash-based deduplication grouping records by a key hash (O(n))

Answer

Hash-based deduplication groups records by a key hash in a single O(n) pass, making it the most scalable approach for large datasets.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram Data Structures and Algorithms 5