The phrase "an introductory section" is correct and usable in written English.
You can use it when you want to refer to a section at the beginning of a document, essay, or book that provides an introduction or overview of the subject. For example: "This report begins with an introductory section that outlines the goals and objectives of the project."
The show begins with an introductory section of historical works, ranging from engravings after Caravaggio and Chardin to nineteenth-century caricatures by Daumier and Paul Gavarni.
After an introductory section, one hears the fire, quite light and delicate in its energy, the calm water (a slow procession of chords) and the mountain winds.
The bilingual exhibition (all wall labels and short films are in English and Spanish) has an introductory section about the artists' years before Detroit, a main part focused on their time in the city, and a coda.
The museum generously lards the show with examples of coeval European paintings (usually to Oller's detriment); there's also an introductory section of broadly defined Caribbean art, from a Mexican casta painting depicting colonial miscegenation to a Winslow Homer watercolor of a Key West beach.
Following an introductory section with background and general information and a summary, focus is on the diagnostic process and on clinical investigation and organisation.
This communication begins with an introductory section, while in Section 2, we introduce the first order exponential type (HA alpha,beta,gamma,xi,rho,eta,h cdot,cdot),theta ))-V-invexities along with some auxiliary results which will be needed in the sequel.
Each chapter is a comprehensive stand-alone review, including a detailed content section, an introductory discussion section, a conclusion/summary section and a comprehensive bibliography.
This paper is organized as follows: Background section continues with an extended introductory section on transcriptional regulation and genetic circuits that provides the framework of discussion of the existing models and experimental implementations.
In a small introductory section, pieces by a few of Mr. Pisano's favorite historical figures -- including Arthur Dove, Helen Torr, Fairfield Porter, John Marin and Ernest Lawson -- illustrate various approaches to specific times of day.
Built as an iBooks-enhanced textbook (as opposed to a free-standing iPad app) and part of a series called "The Shakesperience," this "Othello" takes a little getting used to, but it includes a short introductory section that explains its various features.
The code begins with a brief introductory section setting forth the details of its application.
