In-phase and out-of-phase sequences

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In-phase (IP) and out-of-phase (OOF) sequences correspond to paired MRI gradient echo (GRE) sequences obtained with the same repetition time (TR) but with two different echo time (TE) values.

Applications

The main application of the IP-OOP sequences is to identify ~~a pathological~~pathological (microsopic) fat content of tissues in the abdomen by showing signal intensities drop on the OOP images compared to the IP images. Examples where IP-OOP sequences are useful include:

fatty liver
adrenal adenoma (helping differentiate it from carcinomas and metastases)
renal cell carcinoma (RCC)

-<p><strong>In-phase (IP) and out-of-phase (OOF)</strong> sequences correspond to paired MRI <a href="/articles/gradient-echo-sequences-1">gradient echo (GRE) sequences</a> obtained with the same <a href="/articles/repetition-time">repetition time (TR)</a> but with two different <a href="/articles/echo-time">echo time (TE)</a> values. </p><h4>Applications</h4><p>The main application of the IP-OOP sequences is to identify a pathological fat content of tissues in the abdomen by showing signal intensities drop on the OOP images compared to the IP images. Examples where IP-OOP sequences are useful include:</p><ul>
~~-<li><a title="Fatty liver" href="/articles/hepatic-steatosis">fatty liver</a></li>~~
+<p><strong>In-phase (IP) and out-of-phase (OOF)</strong> sequences correspond to paired MRI <a href="/articles/gradient-echo-sequences-1">gradient echo (GRE) sequences</a> obtained with the same <a href="/articles/repetition-time">repetition time (TR)</a> but with two different <a href="/articles/echo-time">echo time (TE)</a> values. </p><h4>Applications</h4><p>The main application of the IP-OOP sequences is to identify pathological (microsopic) fat content of tissues in the abdomen by showing signal intensities drop on the OOP images compared to the IP images. Examples where IP-OOP sequences are useful include:</p><ul>
+<li><a href="/articles/hepatic-steatosis">fatty liver</a></li>
~~-<a title="Adrenal adenomas" href="/articles/adrenal-adenoma">adrenal adenoma</a> (helping differentiate it from carcinomas and metastases)</li>~~
~~-<li><a title="Renal cell carcinoma (RCC)" href="/articles/renal-cell-carcinoma-1">renal cell carcinoma (RCC)</a></li>~~
+<a href="/articles/adrenal-adenoma">adrenal adenoma</a> (helping differentiate it from carcinomas and metastases)</li>
+<li><a href="/articles/renal-cell-carcinoma-1">renal cell carcinoma (RCC)</a></li>

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In-phase and out-of-phase sequences

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